{
  "name": "OSHA PSM vs EPA RMP: chemical threshold quantities side by side",
  "description": "Side-by-side comparison of threshold quantities for hazardous chemicals regulated under OSHA's Process Safety Management standard (29 CFR 1910.119 Appendix A) and EPA's Risk Management Program (40 CFR 68.130). Each record is one chemical with the threshold quantity in pounds that triggers obligations under each program. Many chemicals appear on both lists with different thresholds \u2014 chlorine is 1,500 lbs under PSM and 2,500 lbs under RMP; ethylene oxide is 5,000 lbs under PSM and 10,000 lbs under RMP. EPA has ~27 chemicals not on the OSHA list and OSHA has ~79 not on EPA's. Answers 'is [chemical] covered by PSM, RMP, or both?', 'what is the threshold quantity for chlorine under each program?', and 'which chemicals have different thresholds under PSM and RMP?'",
  "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/",
  "licence": "US federal regulation \u2014 public domain",
  "last_verified": "2026-08-15",
  "stale_after": "2027-08-15",
  "sources": [
    "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
    "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA"
  ],
  "records": [
    {
      "substance": "1,1-Dimethylhydrazine [Hydrazine, 1,1-dimethyl-]",
      "cas_number": "57-14-7",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "1-1-dimethylhydrazine-hydrazine-1-1-dimethyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/1-1-dimethylhydrazine-hydrazine-1-1-dimethyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "1,1-Dimethylhydrazine [Hydrazine, 1,1-dimethyl-] | 57-14-7 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ],
      "also_reported": [
        {
          "field": "psm_tq_lbs",
          "value": "1000",
          "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
          "source_quote": "Dimethylhydrazine, 1,1- | 57-14-7 | 1000",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "1,3-Butadiene",
      "cas_number": "106-99-0",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "1-3-butadiene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/1-3-butadiene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "1,3-Butadiene | 106-99-0 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "1,3-Pentadinene",
      "cas_number": "504-60-9",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "1-3-pentadinene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/1-3-pentadinene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "1,3-Pentadinene | 504-60-9 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "1-Butene",
      "cas_number": "106-98-9",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "1-butene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/1-butene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "1-Butene | 106-98-9 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "1-Chloro-2,4-Dinitrobenzene",
      "cas_number": "97-00-7",
      "psm_tq_lbs": "5000",
      "id": "1-chloro-2-4-dinitrobenzene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/1-chloro-2-4-dinitrobenzene/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "1-Chloro-2,4-Dinitrobenzene | 97-00-7 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "1-Chloropropylene [1-Propene, 1-chloro-]",
      "cas_number": "590-21-6",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "1-chloropropylene-1-propene-1-chloro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/1-chloropropylene-1-propene-1-chloro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "1-Chloropropylene [1-Propene, 1-chloro-] | 590-21-6 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "1-Pentene",
      "cas_number": "109-67-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "1-pentene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/1-pentene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "1-Pentene | 109-67-1 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2,2-Dimethylpropane [Propane, 2,2-dimethyl-]",
      "cas_number": "463-82-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "2-2-dimethylpropane-propane-2-2-dimethyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-2-dimethylpropane-propane-2-2-dimethyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2,2-Dimethylpropane [Propane, 2,2-dimethyl-] | 463-82-1 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2,4-Dinitroaniline",
      "cas_number": "97-02-9",
      "psm_tq_lbs": "5000",
      "id": "2-4-dinitroaniline",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-4-dinitroaniline/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "2,4-Dinitroaniline | 97-02-9 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "2-Butene",
      "cas_number": "107-01-7",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "2-butene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-butene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2-Butene | 107-01-7 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2-Butene-cis",
      "cas_number": "590-18-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "2-butene-cis",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-butene-cis/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2-Butene-cis | 590-18-1 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2-Butene-trans [2-Butene, (E)]",
      "cas_number": "624-64-6",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "2-butene-trans-2-butene-e",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-butene-trans-2-butene-e/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2-Butene-trans [2-Butene, (E)] | 624-64-6 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2-Chloropropylene [1-Propene, 2-chloro-]",
      "cas_number": "557-98-2",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "2-chloropropylene-1-propene-2-chloro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-chloropropylene-1-propene-2-chloro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2-Chloropropylene [1-Propene, 2-chloro-] | 557-98-2 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2-Methyl-1-butene",
      "cas_number": "563-46-2",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "2-methyl-1-butene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-methyl-1-butene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2-Methyl-1-butene | 563-46-2 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2-Methylpropene [1-Propene, 2-methyl-]",
      "cas_number": "115-11-7",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "2-methylpropene-1-propene-2-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-methylpropene-1-propene-2-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2-Methylpropene [1-Propene, 2-methyl-] | 115-11-7 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2-Pentene, (E)-",
      "cas_number": "646-04-8",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "2-pentene-e",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-pentene-e/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2-Pentene, (E)- | 646-04-8 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "2-Pentene, (Z)-",
      "cas_number": "627-20-3",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "2-pentene-z",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/2-pentene-z/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "2-Pentene, (Z)- | 627-20-3 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "3-Bromopropyne (also called Propargyl Bromide)",
      "cas_number": "106-96-7",
      "psm_tq_lbs": "100",
      "id": "3-bromopropyne-also-called-propargyl-bromide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/3-bromopropyne-also-called-propargyl-bromide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "3-Bromopropyne (also called Propargyl Bromide) | 106-96-7 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "3-Methyl-1-butene",
      "cas_number": "563-45-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "3-methyl-1-butene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/3-methyl-1-butene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "3-Methyl-1-butene | 563-45-1 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Acetaldehyde",
      "cas_number": "75-07-0",
      "psm_tq_lbs": "2500",
      "id": "acetaldehyde",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/acetaldehyde/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Acetaldehyde | 75-07-0 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acetaldehyde | 75-07-0 | 10,000 | g",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acetaldehyde | 75-07-0 | 10,000 | g",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "g",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acetaldehyde | 75-07-0 | 10,000 | g",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Acetylene [Ethyne]",
      "cas_number": "74-86-2",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "acetylene-ethyne",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/acetylene-ethyne/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Acetylene [Ethyne] | 74-86-2 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Acrolein (2-Propenal)",
      "cas_number": "107-02-8",
      "psm_tq_lbs": "150",
      "id": "acrolein-2-propenal",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/acrolein-2-propenal/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Acrolein (2-Propenal) | 107-02-8 | 150",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acrolein [2-Propenal] | 107-02-8 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acrolein [2-Propenal] | 107-02-8 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acrolein [2-Propenal] | 107-02-8 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Acrylonitrile [2-Propenenitrile]",
      "cas_number": "107-13-1",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "acrylonitrile-2-propenenitrile",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/acrylonitrile-2-propenenitrile/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Acrylonitrile [2-Propenenitrile] | 107-13-1 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Acrylyl Chloride",
      "cas_number": "814-68-6",
      "psm_tq_lbs": "250",
      "id": "acrylyl-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/acrylyl-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Acrylyl Chloride | 814-68-6 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acrylyl chloride [2-Propenoyl chloride] | 814-68-6 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acrylyl chloride [2-Propenoyl chloride] | 814-68-6 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Acrylyl chloride [2-Propenoyl chloride] | 814-68-6 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Alkylaluminums",
      "cas_number": "Varies",
      "psm_tq_lbs": "5000",
      "id": "alkylaluminums",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/alkylaluminums/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Alkylaluminums | Varies | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Allyl alcohol [2-Propen-l-ol]",
      "cas_number": "107-18-6",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "allyl-alcohol-2-propen-l-ol",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/allyl-alcohol-2-propen-l-ol/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Allyl alcohol [2-Propen-l-ol] | 107-18-6 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Allyl Chloride",
      "cas_number": "107-05-1",
      "psm_tq_lbs": "1000",
      "id": "allyl-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/allyl-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Allyl Chloride | 107-05-1 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Allylamine",
      "cas_number": "107-11-9",
      "psm_tq_lbs": "1000",
      "id": "allylamine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/allylamine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Allylamine | 107-11-9 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Allylamine [2-Propen-l-amine] | 107-11-9 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Allylamine [2-Propen-l-amine] | 107-11-9 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Allylamine [2-Propen-l-amine] | 107-11-9 | 10,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Ammonia, Anhydrous",
      "cas_number": "7664-41-7",
      "psm_tq_lbs": "10000",
      "id": "ammonia-anhydrous",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ammonia-anhydrous/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ammonia, Anhydrous | 7664-41-7 | 10000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Ammonia (anhydrous)",
      "cas_number": "7664-41-7",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "a, b",
      "id": "ammonia-anhydrous-2",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ammonia-anhydrous-2/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ammonia (anhydrous) | 7664-41-7 | 10,000 | a, b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ammonia (conc 20% or greater)",
      "cas_number": "7664-41-7",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "a, b",
      "id": "ammonia-conc-20-or-greater",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ammonia-conc-20-or-greater/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ammonia (conc 20% or greater) | 7664-41-7 | 20,000 | a, b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ammonia solutions (>44% ammonia by weight)",
      "cas_number": "7664-41-7",
      "psm_tq_lbs": "15000",
      "id": "ammonia-solutions-44-ammonia-by-weight",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ammonia-solutions-44-ammonia-by-weight/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ammonia solutions (>44% ammonia by weight) | 7664-41-7 | 15000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Ammonium Perchlorate",
      "cas_number": "7790-98-9",
      "psm_tq_lbs": "7500",
      "id": "ammonium-perchlorate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ammonium-perchlorate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ammonium Perchlorate | 7790-98-9 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Ammonium Permanganate",
      "cas_number": "7787-36-2",
      "psm_tq_lbs": "7500",
      "id": "ammonium-permanganate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ammonium-permanganate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ammonium Permanganate | 7787-36-2 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Arsenous trichloride",
      "cas_number": "7784-34-1",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "arsenous-trichloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/arsenous-trichloride/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Arsenous trichloride | 7784-34-1 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Arsine",
      "cas_number": "7784-42-1",
      "rmp_tq_lbs": "1,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "arsine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/arsine/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Arsine | 7784-42-1 | 1,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ],
      "also_reported": [
        {
          "field": "psm_tq_lbs",
          "value": "100",
          "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
          "source_quote": "Arsine (also called Arsenic Hydride) | 7784-42-1 | 100",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Bis(Chloromethyl) Ether",
      "cas_number": "542-88-1",
      "psm_tq_lbs": "100",
      "id": "bis-chloromethyl-ether",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/bis-chloromethyl-ether/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Bis(Chloromethyl) Ether | 542-88-1 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "1,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chloromethyl ether [Methane, oxybis[chloro-] | 542-88-1 | 1,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chloromethyl ether [Methane, oxybis[chloro-] | 542-88-1 | 1,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chloromethyl ether [Methane, oxybis[chloro-] | 542-88-1 | 1,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Boron Trichloride",
      "cas_number": "10294-34-5",
      "psm_tq_lbs": "2500",
      "id": "boron-trichloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/boron-trichloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Boron Trichloride | 10294-34-5 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Boron trichloride [Borane, trichloro-] | 10294-34-5 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Boron trichloride [Borane, trichloro-] | 10294-34-5 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Boron trichloride [Borane, trichloro-] | 10294-34-5 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Boron Trifluoride",
      "cas_number": "7637-07-2",
      "psm_tq_lbs": "250",
      "id": "boron-trifluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/boron-trifluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Boron Trifluoride | 7637-07-2 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Boron trifluoride [Borane, trifluoro-] | 7637-07-2 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Boron trifluoride [Borane, trifluoro-] | 7637-07-2 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Boron trifluoride [Borane, trifluoro-] | 7637-07-2 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Boron trifluoride compound with methyl ether (1:1) [Boron, trifluoro [oxybis [metane]]-, T-4-",
      "cas_number": "353-42-4",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "boron-trifluoride-compound-with-methyl-ether-1-1-boron-trifluoro-oxybis-metane-t",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/boron-trifluoride-compound-with-methyl-ether-1-1-boron-trifluoro-oxybis-metane-t/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Boron trifluoride compound with methyl ether (1:1) [Boron, trifluoro [oxybis [metane]]-, T-4- | 353-42-4 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Bromine",
      "cas_number": "7726-95-6",
      "psm_tq_lbs": "1500",
      "id": "bromine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/bromine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Bromine | 7726-95-6 | 1500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Bromine | 7726-95-6 | 10,000 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Bromine | 7726-95-6 | 10,000 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "a, b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Bromine | 7726-95-6 | 10,000 | a, b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Bromine Chloride",
      "cas_number": "13863-41-7",
      "psm_tq_lbs": "1500",
      "id": "bromine-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/bromine-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Bromine Chloride | 13863-41-7 | 1500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Bromine Pentafluoride",
      "cas_number": "7789-30-2",
      "psm_tq_lbs": "2500",
      "id": "bromine-pentafluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/bromine-pentafluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Bromine Pentafluoride | 7789-30-2 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Bromine Trifluoride",
      "cas_number": "7787-71-5",
      "psm_tq_lbs": "15000",
      "id": "bromine-trifluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/bromine-trifluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Bromine Trifluoride | 7787-71-5 | 15000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Bromotrifluorethylene [Ethene, bromotrifluoro-]",
      "cas_number": "598-73-2",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "bromotrifluorethylene-ethene-bromotrifluoro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/bromotrifluorethylene-ethene-bromotrifluoro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Bromotrifluorethylene [Ethene, bromotrifluoro-] | 598-73-2 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Butane",
      "cas_number": "106-97-8",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "butane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/butane/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Butane | 106-97-8 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Butene",
      "cas_number": "25167-67-3",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "butene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/butene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Butene | 25167-67-3 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Butyl Hydroperoxide (Tertiary)",
      "cas_number": "75-91-2",
      "psm_tq_lbs": "5000",
      "id": "butyl-hydroperoxide-tertiary",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/butyl-hydroperoxide-tertiary/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Butyl Hydroperoxide (Tertiary) | 75-91-2 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Butyl Perbenzoate (Tertiary)",
      "cas_number": "614-45-9",
      "psm_tq_lbs": "7500",
      "id": "butyl-perbenzoate-tertiary",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/butyl-perbenzoate-tertiary/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Butyl Perbenzoate (Tertiary) | 614-45-9 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Carbon disulfide",
      "cas_number": "75-15-0",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "carbon-disulfide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/carbon-disulfide/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Carbon disulfide | 75-15-0 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Carbon oxysulfide [Carbon oxide sulfide (COS)]",
      "cas_number": "463-58-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "carbon-oxysulfide-carbon-oxide-sulfide-cos",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/carbon-oxysulfide-carbon-oxide-sulfide-cos/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Carbon oxysulfide [Carbon oxide sulfide (COS)] | 463-58-1 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Carbonyl Chloride (see Phosgene)",
      "cas_number": "75-44-5",
      "psm_tq_lbs": "100",
      "id": "carbonyl-chloride-see-phosgene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/carbonyl-chloride-see-phosgene/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Carbonyl Chloride (see Phosgene) | 75-44-5 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Carbonyl Fluoride",
      "cas_number": "353-50-4",
      "psm_tq_lbs": "2500",
      "id": "carbonyl-fluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/carbonyl-fluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Carbonyl Fluoride | 353-50-4 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Cellulose Nitrate (concentration >12.6% nitrogen)",
      "cas_number": "9004-70-0",
      "psm_tq_lbs": "2500",
      "id": "cellulose-nitrate-concentration-12-6-nitrogen",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/cellulose-nitrate-concentration-12-6-nitrogen/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Cellulose Nitrate (concentration >12.6% nitrogen) | 9004-70-0 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Chlorine",
      "cas_number": "7782-50-5",
      "psm_tq_lbs": "1500",
      "id": "chlorine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chlorine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chlorine | 7782-50-5 | 1500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "2,500",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chlorine | 7782-50-5 | 2,500 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chlorine | 7782-50-5 | 2,500 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "a, b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chlorine | 7782-50-5 | 2,500 | a, b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Chlorine Dioxide",
      "cas_number": "10049-04-4",
      "psm_tq_lbs": "1000",
      "id": "chlorine-dioxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chlorine-dioxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chlorine Dioxide | 10049-04-4 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "1,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chlorine dioxide [Chlorine oxide (ClO2)] | 10049-04-4 | 1,000 | c",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chlorine dioxide [Chlorine oxide (ClO2)] | 10049-04-4 | 1,000 | c",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "c",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chlorine dioxide [Chlorine oxide (ClO2)] | 10049-04-4 | 1,000 | c",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Chlorine monoxide [Chlorine oxide]",
      "cas_number": "7791-21-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "chlorine-monoxide-chlorine-oxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chlorine-monoxide-chlorine-oxide/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Chlorine monoxide [Chlorine oxide] | 7791-21-1 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Chlorine Pentrafluoride",
      "cas_number": "13637-63-3",
      "psm_tq_lbs": "1000",
      "id": "chlorine-pentrafluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chlorine-pentrafluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chlorine Pentrafluoride | 13637-63-3 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Chlorine Trifluoride",
      "cas_number": "7790-91-2",
      "psm_tq_lbs": "1000",
      "id": "chlorine-trifluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chlorine-trifluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chlorine Trifluoride | 7790-91-2 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Chlorodiethylaluminum (also called Diethylaluminum Chloride)",
      "cas_number": "96-10-6",
      "psm_tq_lbs": "5000",
      "id": "chlorodiethylaluminum-also-called-diethylaluminum-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chlorodiethylaluminum-also-called-diethylaluminum-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chlorodiethylaluminum (also called Diethylaluminum Chloride) | 96-10-6 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Chloroform [Methane, trichloro-]",
      "cas_number": "67-66-3",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "chloroform-methane-trichloro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chloroform-methane-trichloro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Chloroform [Methane, trichloro-] | 67-66-3 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Chloromethyl Methyl Ether",
      "cas_number": "107-30-2",
      "psm_tq_lbs": "500",
      "id": "chloromethyl-methyl-ether",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chloromethyl-methyl-ether/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chloromethyl Methyl Ether | 107-30-2 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chloromethyl methyl ether [Methane, chloromethoxy-] | 107-30-2 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chloromethyl methyl ether [Methane, chloromethoxy-] | 107-30-2 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Chloromethyl methyl ether [Methane, chloromethoxy-] | 107-30-2 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Chloropicrin",
      "cas_number": "76-06-2",
      "psm_tq_lbs": "500",
      "id": "chloropicrin",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chloropicrin/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chloropicrin | 76-06-2 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Chloropicrin and Methyl Bromide mixture",
      "cas_number": "None",
      "psm_tq_lbs": "1500",
      "id": "chloropicrin-and-methyl-bromide-mixture",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chloropicrin-and-methyl-bromide-mixture/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chloropicrin and Methyl Bromide mixture | None | 1500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Chloropicrin and Methyl Chloride mixture",
      "cas_number": "None",
      "psm_tq_lbs": "1500",
      "id": "chloropicrin-and-methyl-chloride-mixture",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/chloropicrin-and-methyl-chloride-mixture/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Chloropicrin and Methyl Chloride mixture | None | 1500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Crotonaldehyde [2-Butenal]",
      "cas_number": "4170-30-3",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "crotonaldehyde-2-butenal",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/crotonaldehyde-2-butenal/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Crotonaldehyde [2-Butenal] | 4170-30-3 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Crotonaldehyde, (E)- [2-Butenal, (E)-]",
      "cas_number": "123-73-9",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "crotonaldehyde-e-2-butenal-e",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/crotonaldehyde-e-2-butenal-e/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Crotonaldehyde, (E)- [2-Butenal, (E)-] | 123-73-9 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Cumene Hydroperoxide",
      "cas_number": "80-15-9",
      "psm_tq_lbs": "5000",
      "id": "cumene-hydroperoxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/cumene-hydroperoxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Cumene Hydroperoxide | 80-15-9 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Cyanogen",
      "cas_number": "460-19-5",
      "psm_tq_lbs": "2500",
      "id": "cyanogen",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/cyanogen/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Cyanogen | 460-19-5 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Cyanogen [Ethanedinitrile] | 460-19-5 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Cyanogen [Ethanedinitrile] | 460-19-5 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "f",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Cyanogen [Ethanedinitrile] | 460-19-5 | 10,000 | f",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Cyanogen Chloride",
      "cas_number": "506-77-4",
      "psm_tq_lbs": "500",
      "id": "cyanogen-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/cyanogen-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Cyanogen Chloride | 506-77-4 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Cyanogen chloride | 506-77-4 | 10,000 | c",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Cyanogen chloride | 506-77-4 | 10,000 | c",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "c",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Cyanogen chloride | 506-77-4 | 10,000 | c",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Cyanuric Fluoride",
      "cas_number": "675-14-9",
      "psm_tq_lbs": "100",
      "id": "cyanuric-fluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/cyanuric-fluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Cyanuric Fluoride | 675-14-9 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Cyclohexylamine [Cyclohexanamine]",
      "cas_number": "108-91-8",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "cyclohexylamine-cyclohexanamine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/cyclohexylamine-cyclohexanamine/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Cyclohexylamine [Cyclohexanamine] | 108-91-8 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Cyclopropane",
      "cas_number": "75-19-4",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "cyclopropane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/cyclopropane/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Cyclopropane | 75-19-4 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Diacetyl Peroxide (Concentration >70%)",
      "cas_number": "110-22-5",
      "psm_tq_lbs": "5000",
      "id": "diacetyl-peroxide-concentration-70",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/diacetyl-peroxide-concentration-70/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Diacetyl Peroxide (Concentration >70%) | 110-22-5 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Diazomethane",
      "cas_number": "334-88-3",
      "psm_tq_lbs": "500",
      "id": "diazomethane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/diazomethane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Diazomethane | 334-88-3 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Dibenzoyl Peroxide",
      "cas_number": "94-36-0",
      "psm_tq_lbs": "7500",
      "id": "dibenzoyl-peroxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/dibenzoyl-peroxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Dibenzoyl Peroxide | 94-36-0 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Diborane",
      "cas_number": "19287-45-7",
      "psm_tq_lbs": "100",
      "id": "diborane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/diborane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Diborane | 19287-45-7 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "2,500",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Diborane | 19287-45-7 | 2,500 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Diborane | 19287-45-7 | 2,500 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Diborane | 19287-45-7 | 2,500 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Dibutyl Peroxide (Tertiary)",
      "cas_number": "110-05-4",
      "psm_tq_lbs": "5000",
      "id": "dibutyl-peroxide-tertiary",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/dibutyl-peroxide-tertiary/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Dibutyl Peroxide (Tertiary) | 110-05-4 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Dichloro Acetylene",
      "cas_number": "7572-29-4",
      "psm_tq_lbs": "250",
      "id": "dichloro-acetylene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/dichloro-acetylene/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Dichloro Acetylene | 7572-29-4 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Dichlorosilane",
      "cas_number": "4109-96-0",
      "psm_tq_lbs": "2500",
      "id": "dichlorosilane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/dichlorosilane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Dichlorosilane | 4109-96-0 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dichlorosilane [Silane, dichloro-] | 4109-96-0 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dichlorosilane [Silane, dichloro-] | 4109-96-0 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "f",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dichlorosilane [Silane, dichloro-] | 4109-96-0 | 10,000 | f",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Diethylzinc",
      "cas_number": "557-20-0",
      "psm_tq_lbs": "10000",
      "id": "diethylzinc",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/diethylzinc/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Diethylzinc | 557-20-0 | 10000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Difluoroethane [Ethane, 1,1-difluoro-]",
      "cas_number": "75-37-6",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "difluoroethane-ethane-1-1-difluoro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/difluoroethane-ethane-1-1-difluoro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Difluoroethane [Ethane, 1,1-difluoro-] | 75-37-6 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Diisopropyl Peroxydicarbonate",
      "cas_number": "105-64-6",
      "psm_tq_lbs": "7500",
      "id": "diisopropyl-peroxydicarbonate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/diisopropyl-peroxydicarbonate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Diisopropyl Peroxydicarbonate | 105-64-6 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Dilaluroyl Peroxide",
      "cas_number": "105-74-8",
      "psm_tq_lbs": "7500",
      "id": "dilaluroyl-peroxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/dilaluroyl-peroxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Dilaluroyl Peroxide | 105-74-8 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Dimethylamine, Anhydrous",
      "cas_number": "124-40-3",
      "psm_tq_lbs": "2500",
      "id": "dimethylamine-anhydrous",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/dimethylamine-anhydrous/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Dimethylamine, Anhydrous | 124-40-3 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dimethylamine [Methanamine, N-methyl-] | 124-40-3 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dimethylamine [Methanamine, N-methyl-] | 124-40-3 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "f",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dimethylamine [Methanamine, N-methyl-] | 124-40-3 | 10,000 | f",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Dimethyldichlorosilane",
      "cas_number": "75-78-5",
      "psm_tq_lbs": "1000",
      "id": "dimethyldichlorosilane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/dimethyldichlorosilane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Dimethyldichlorosilane | 75-78-5 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dimethyldichlorosilane [Silane, dichlorodimethyl-] | 75-78-5 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dimethyldichlorosilane [Silane, dichlorodimethyl-] | 75-78-5 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Dimethyldichlorosilane [Silane, dichlorodimethyl-] | 75-78-5 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Epichlorohydrin [Oxirane, (chloromethyl)-]",
      "cas_number": "106-89-8",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "epichlorohydrin-oxirane-chloromethyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/epichlorohydrin-oxirane-chloromethyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Epichlorohydrin [Oxirane, (chloromethyl)-] | 106-89-8 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ethane",
      "cas_number": "74-84-0",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "ethane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethane/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ethane | 74-84-0 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ethyl acetylene [1-Butyne]",
      "cas_number": "107-00-6",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "ethyl-acetylene-1-butyne",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethyl-acetylene-1-butyne/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ethyl acetylene [1-Butyne] | 107-00-6 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ethyl chloride [Ethane, chloro-]",
      "cas_number": "75-00-3",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "ethyl-chloride-ethane-chloro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethyl-chloride-ethane-chloro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ethyl chloride [Ethane, chloro-] | 75-00-3 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ethyl ether [Ethane, 1,1\u2032-oxybis-]",
      "cas_number": "60-29-7",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "ethyl-ether-ethane-1-1-oxybis",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethyl-ether-ethane-1-1-oxybis/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ethyl ether [Ethane, 1,1\u2032-oxybis-] | 60-29-7 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ethyl mercaptan [Ethanethiol]",
      "cas_number": "75-08-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "ethyl-mercaptan-ethanethiol",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethyl-mercaptan-ethanethiol/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ethyl mercaptan [Ethanethiol] | 75-08-1 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration >60%)",
      "cas_number": "1338-23-4",
      "psm_tq_lbs": "5000",
      "id": "ethyl-methyl-ketone-peroxide-also-methyl-ethyl-ketone-peroxide-concentration-60",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethyl-methyl-ketone-peroxide-also-methyl-ethyl-ketone-peroxide-concentration-60/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration >60%) | 1338-23-4 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Ethyl Nitrite",
      "cas_number": "109-95-5",
      "psm_tq_lbs": "5000",
      "id": "ethyl-nitrite",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethyl-nitrite/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ethyl Nitrite | 109-95-5 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethyl nitrite [Nitrous acid, ethyl ester] | 109-95-5 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethyl nitrite [Nitrous acid, ethyl ester] | 109-95-5 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "f",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethyl nitrite [Nitrous acid, ethyl ester] | 109-95-5 | 10,000 | f",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Ethylamine",
      "cas_number": "75-04-7",
      "psm_tq_lbs": "7500",
      "id": "ethylamine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethylamine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ethylamine | 75-04-7 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethylamine [Ethanamine] | 75-04-7 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethylamine [Ethanamine] | 75-04-7 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "f",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethylamine [Ethanamine] | 75-04-7 | 10,000 | f",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Ethylene [Ethene]",
      "cas_number": "74-85-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "ethylene-ethene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethylene-ethene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ethylene [Ethene] | 74-85-1 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ethylene Fluorohydrin",
      "cas_number": "371-62-0",
      "psm_tq_lbs": "100",
      "id": "ethylene-fluorohydrin",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethylene-fluorohydrin/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ethylene Fluorohydrin | 371-62-0 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Ethylene Oxide",
      "cas_number": "75-21-8",
      "psm_tq_lbs": "5000",
      "id": "ethylene-oxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethylene-oxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ethylene Oxide | 75-21-8 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethylene oxide [Oxirane] | 75-21-8 | 10,000 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethylene oxide [Oxirane] | 75-21-8 | 10,000 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "a, b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethylene oxide [Oxirane] | 75-21-8 | 10,000 | a, b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Ethylenediamine [1,2-Ethanediamine]",
      "cas_number": "107-15-3",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "ethylenediamine-1-2-ethanediamine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethylenediamine-1-2-ethanediamine/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Ethylenediamine [1,2-Ethanediamine] | 107-15-3 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Ethyleneimine",
      "cas_number": "151-56-4",
      "psm_tq_lbs": "1000",
      "id": "ethyleneimine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ethyleneimine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ethyleneimine | 151-56-4 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethyleneimine [Aziridine] | 151-56-4 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethyleneimine [Aziridine] | 151-56-4 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Ethyleneimine [Aziridine] | 151-56-4 | 10,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Fluorine",
      "cas_number": "7782-41-4",
      "psm_tq_lbs": "1000",
      "id": "fluorine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/fluorine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Fluorine | 7782-41-4 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "1,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Fluorine | 7782-41-4 | 1,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Fluorine | 7782-41-4 | 1,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Fluorine | 7782-41-4 | 1,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Formaldehyde (Formalin)",
      "cas_number": "50-00-0",
      "psm_tq_lbs": "1000",
      "id": "formaldehyde-formalin",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/formaldehyde-formalin/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Formaldehyde (Formalin) | 50-00-0 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "15,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Formaldehyde (solution) | 50-00-0 | 15,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Formaldehyde (solution) | 50-00-0 | 15,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Formaldehyde (solution) | 50-00-0 | 15,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Furan",
      "cas_number": "110-00-9",
      "psm_tq_lbs": "500",
      "id": "furan",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/furan/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Furan | 110-00-9 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Furan | 110-00-9 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Furan | 110-00-9 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Furan | 110-00-9 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Hexafluoroacetone",
      "cas_number": "684-16-2",
      "psm_tq_lbs": "5000",
      "id": "hexafluoroacetone",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hexafluoroacetone/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hexafluoroacetone | 684-16-2 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Hydrazine",
      "cas_number": "302-01-2",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "hydrazine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrazine/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Hydrazine | 302-01-2 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Hydrochloric Acid, Anhydrous",
      "cas_number": "7647-01-0",
      "psm_tq_lbs": "5000",
      "id": "hydrochloric-acid-anhydrous",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrochloric-acid-anhydrous/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydrochloric Acid, Anhydrous | 7647-01-0 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Hydrochloric acid (conc 37% or greater)",
      "cas_number": "7647-01-0",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "d",
      "id": "hydrochloric-acid-conc-37-or-greater",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrochloric-acid-conc-37-or-greater/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Hydrochloric acid (conc 37% or greater) | 7647-01-0 | 15,000 | d",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Hydrocyanic acid",
      "cas_number": "74-90-8",
      "rmp_tq_lbs": "2,500",
      "rmp_category": "toxic",
      "rmp_basis": "a, b",
      "id": "hydrocyanic-acid",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrocyanic-acid/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Hydrocyanic acid | 74-90-8 | 2,500 | a, b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ],
      "also_reported": [
        {
          "field": "psm_tq_lbs",
          "value": "1000",
          "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
          "source_quote": "Hydrogen Cyanide, Anhydrous | 74-90-8 | 1000",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Hydrofluoric Acid, Anhydrous",
      "cas_number": "7664-39-3",
      "psm_tq_lbs": "1000",
      "id": "hydrofluoric-acid-anhydrous",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrofluoric-acid-anhydrous/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydrofluoric Acid, Anhydrous | 7664-39-3 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Hydrogen",
      "cas_number": "1333-74-0",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "hydrogen",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Hydrogen | 1333-74-0 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Hydrogen Bromide",
      "cas_number": "10035-10-6",
      "psm_tq_lbs": "5000",
      "id": "hydrogen-bromide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen-bromide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydrogen Bromide | 10035-10-6 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Hydrogen Chloride",
      "cas_number": "7647-01-0",
      "psm_tq_lbs": "5000",
      "id": "hydrogen-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydrogen Chloride | 7647-01-0 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Hydrogen chloride (anhydrous) [Hydrochloric acid]",
      "cas_number": "7647-01-0",
      "rmp_tq_lbs": "5,000",
      "rmp_category": "toxic",
      "rmp_basis": "a",
      "id": "hydrogen-chloride-anhydrous-hydrochloric-acid",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen-chloride-anhydrous-hydrochloric-acid/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Hydrogen chloride (anhydrous) [Hydrochloric acid] | 7647-01-0 | 5,000 | a",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Hydrogen Fluoride",
      "cas_number": "7664-39-3",
      "psm_tq_lbs": "1000",
      "id": "hydrogen-fluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen-fluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydrogen Fluoride | 7664-39-3 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid]",
      "cas_number": "7664-39-3",
      "rmp_tq_lbs": "1,000",
      "rmp_category": "toxic",
      "rmp_basis": "a, b",
      "id": "hydrogen-fluoride-hydrofluoric-acid-conc-50-or-greater-hydrofluoric-acid",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen-fluoride-hydrofluoric-acid-conc-50-or-greater-hydrofluoric-acid/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Hydrogen fluoride/Hydrofluoric acid (conc 50% or greater) [Hydrofluoric acid] | 7664-39-3 | 1,000 | a, b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Hydrogen Peroxide (52% by weight or greater)",
      "cas_number": "7722-84-1",
      "psm_tq_lbs": "7500",
      "id": "hydrogen-peroxide-52-by-weight-or-greater",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen-peroxide-52-by-weight-or-greater/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydrogen Peroxide (52% by weight or greater) | 7722-84-1 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Hydrogen Selenide",
      "cas_number": "7783-07-5",
      "psm_tq_lbs": "150",
      "id": "hydrogen-selenide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen-selenide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydrogen Selenide | 7783-07-5 | 150",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "500",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Hydrogen selenide | 7783-07-5 | 500 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Hydrogen selenide | 7783-07-5 | 500 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Hydrogen selenide | 7783-07-5 | 500 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Hydrogen Sulfide",
      "cas_number": "7783-06-4",
      "psm_tq_lbs": "1500",
      "id": "hydrogen-sulfide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydrogen-sulfide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydrogen Sulfide | 7783-06-4 | 1500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Hydrogen sulfide | 7783-06-4 | 10,000 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Hydrogen sulfide | 7783-06-4 | 10,000 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "a, b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Hydrogen sulfide | 7783-06-4 | 10,000 | a, b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Hydroxylamine",
      "cas_number": "7803-49-8",
      "psm_tq_lbs": "2500",
      "id": "hydroxylamine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/hydroxylamine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Hydroxylamine | 7803-49-8 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Iron, Pentacarbonyl",
      "cas_number": "13463-40-6",
      "psm_tq_lbs": "250",
      "id": "iron-pentacarbonyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/iron-pentacarbonyl/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Iron, Pentacarbonyl | 13463-40-6 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "2,500",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Iron, pentacarbonyl- [Iron carbonyl (Fe(CO)5), (TB-5-11)-] | 13463-40-6 | 2,500 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Iron, pentacarbonyl- [Iron carbonyl (Fe(CO)5), (TB-5-11)-] | 13463-40-6 | 2,500 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Iron, pentacarbonyl- [Iron carbonyl (Fe(CO)5), (TB-5-11)-] | 13463-40-6 | 2,500 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Isobutane [Propane, 2-methyl]",
      "cas_number": "75-28-5",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "isobutane-propane-2-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/isobutane-propane-2-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Isobutane [Propane, 2-methyl] | 75-28-5 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Isobutyronitrile [Propanenitrile, 2-methyl-]",
      "cas_number": "78-82-0",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "isobutyronitrile-propanenitrile-2-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/isobutyronitrile-propanenitrile-2-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Isobutyronitrile [Propanenitrile, 2-methyl-] | 78-82-0 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Isopentane [Butane, 2-methyl-]",
      "cas_number": "78-78-4",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "isopentane-butane-2-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/isopentane-butane-2-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Isopentane [Butane, 2-methyl-] | 78-78-4 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Isoprene [1,3-Butadinene, 2-methyl-]",
      "cas_number": "78-79-5",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "isoprene-1-3-butadinene-2-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/isoprene-1-3-butadinene-2-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Isoprene [1,3-Butadinene, 2-methyl-] | 78-79-5 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Isopropyl chloride [Propane, 2-chloro-]",
      "cas_number": "75-29-6",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "isopropyl-chloride-propane-2-chloro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/isopropyl-chloride-propane-2-chloro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Isopropyl chloride [Propane, 2-chloro-] | 75-29-6 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Isopropyl chloroformate [Carbonochloridic acid, 1-methylethyl ester]",
      "cas_number": "108-23-6",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "isopropyl-chloroformate-carbonochloridic-acid-1-methylethyl-ester",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/isopropyl-chloroformate-carbonochloridic-acid-1-methylethyl-ester/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Isopropyl chloroformate [Carbonochloridic acid, 1-methylethyl ester] | 108-23-6 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Isopropylamine",
      "cas_number": "75-31-0",
      "psm_tq_lbs": "5000",
      "id": "isopropylamine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/isopropylamine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Isopropylamine | 75-31-0 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Isopropylamine [2-Propanamine] | 75-31-0 | 10,000 | g",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Isopropylamine [2-Propanamine] | 75-31-0 | 10,000 | g",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "g",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Isopropylamine [2-Propanamine] | 75-31-0 | 10,000 | g",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Ketene",
      "cas_number": "463-51-4",
      "psm_tq_lbs": "100",
      "id": "ketene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ketene/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ketene | 463-51-4 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methacrylaldehyde",
      "cas_number": "78-85-3",
      "psm_tq_lbs": "1000",
      "id": "methacrylaldehyde",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methacrylaldehyde/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methacrylaldehyde | 78-85-3 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methacrylonitrile [2-Propenenitrile, 2-methyl-]",
      "cas_number": "126-98-7",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "methacrylonitrile-2-propenenitrile-2-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methacrylonitrile-2-propenenitrile-2-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Methacrylonitrile [2-Propenenitrile, 2-methyl-] | 126-98-7 | 10,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ],
      "also_reported": [
        {
          "field": "psm_tq_lbs",
          "value": "250",
          "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
          "source_quote": "Methyl Acrylonitrile | 126-98-7 | 250",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Methacryloyl Chloride",
      "cas_number": "920-46-7",
      "psm_tq_lbs": "150",
      "id": "methacryloyl-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methacryloyl-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methacryloyl Chloride | 920-46-7 | 150",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methacryloyloxyethyl Isocyanate",
      "cas_number": "30674-80-7",
      "psm_tq_lbs": "100",
      "id": "methacryloyloxyethyl-isocyanate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methacryloyloxyethyl-isocyanate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methacryloyloxyethyl Isocyanate | 30674-80-7 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methane",
      "cas_number": "74-82-8",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "methane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methane/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Methane | 74-82-8 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Methyl Bromide",
      "cas_number": "74-83-9",
      "psm_tq_lbs": "2500",
      "id": "methyl-bromide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-bromide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Bromide | 74-83-9 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methyl Chloride",
      "cas_number": "74-87-3",
      "psm_tq_lbs": "15000",
      "id": "methyl-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Chloride | 74-87-3 | 15000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl chloride [Methane, chloro-] | 74-87-3 | 10,000 | a",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl chloride [Methane, chloro-] | 74-87-3 | 10,000 | a",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "a",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl chloride [Methane, chloro-] | 74-87-3 | 10,000 | a",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Methyl Chloroformate",
      "cas_number": "79-22-1",
      "psm_tq_lbs": "500",
      "id": "methyl-chloroformate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-chloroformate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Chloroformate | 79-22-1 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl chloroformate [Carbonochloridic acid, methylester] | 79-22-1 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl chloroformate [Carbonochloridic acid, methylester] | 79-22-1 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl chloroformate [Carbonochloridic acid, methylester] | 79-22-1 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Methyl ether [Methane, oxybis-]",
      "cas_number": "115-10-6",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "methyl-ether-methane-oxybis",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-ether-methane-oxybis/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Methyl ether [Methane, oxybis-] | 115-10-6 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Methyl Ethyl Ketone Peroxide (concentration >60%)",
      "cas_number": "1338-23-4",
      "psm_tq_lbs": "5000",
      "id": "methyl-ethyl-ketone-peroxide-concentration-60",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-ethyl-ketone-peroxide-concentration-60/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Ethyl Ketone Peroxide (concentration >60%) | 1338-23-4 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methyl Fluoroacetate",
      "cas_number": "453-18-9",
      "psm_tq_lbs": "100",
      "id": "methyl-fluoroacetate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-fluoroacetate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Fluoroacetate | 453-18-9 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methyl Fluorosulfate",
      "cas_number": "421-20-5",
      "psm_tq_lbs": "100",
      "id": "methyl-fluorosulfate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-fluorosulfate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Fluorosulfate | 421-20-5 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methyl formate [Formic acid, methyl ester]",
      "cas_number": "107-31-3",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "methyl-formate-formic-acid-methyl-ester",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-formate-formic-acid-methyl-ester/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Methyl formate [Formic acid, methyl ester] | 107-31-3 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Methyl Hydrazine",
      "cas_number": "60-34-4",
      "psm_tq_lbs": "100",
      "id": "methyl-hydrazine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-hydrazine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Hydrazine | 60-34-4 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "15,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl hydrazine [Hydrazine, methyl-] | 60-34-4 | 15,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl hydrazine [Hydrazine, methyl-] | 60-34-4 | 15,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl hydrazine [Hydrazine, methyl-] | 60-34-4 | 15,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Methyl Iodide",
      "cas_number": "74-88-4",
      "psm_tq_lbs": "7500",
      "id": "methyl-iodide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-iodide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Iodide | 74-88-4 | 7500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methyl Isocyanate",
      "cas_number": "624-83-9",
      "psm_tq_lbs": "250",
      "id": "methyl-isocyanate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-isocyanate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Isocyanate | 624-83-9 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl isocyanate [Methane, isocyanato-] | 624-83-9 | 10,000 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl isocyanate [Methane, isocyanato-] | 624-83-9 | 10,000 | a, b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "a, b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl isocyanate [Methane, isocyanato-] | 624-83-9 | 10,000 | a, b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Methyl Mercaptan",
      "cas_number": "74-93-1",
      "psm_tq_lbs": "5000",
      "id": "methyl-mercaptan",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-mercaptan/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Mercaptan | 74-93-1 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl mercaptan [Methanethiol] | 74-93-1 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl mercaptan [Methanethiol] | 74-93-1 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyl mercaptan [Methanethiol] | 74-93-1 | 10,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Methyl thiocyanate [Thiocyanic acid, methyl ester]",
      "cas_number": "556-64-9",
      "rmp_tq_lbs": "20,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "methyl-thiocyanate-thiocyanic-acid-methyl-ester",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-thiocyanate-thiocyanic-acid-methyl-ester/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Methyl thiocyanate [Thiocyanic acid, methyl ester] | 556-64-9 | 20,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Methyl Vinyl Ketone",
      "cas_number": "78-94-4",
      "psm_tq_lbs": "100",
      "id": "methyl-vinyl-ketone",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyl-vinyl-ketone/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyl Vinyl Ketone | 78-94-4 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Methylamine, Anhydrous",
      "cas_number": "74-89-5",
      "psm_tq_lbs": "1000",
      "id": "methylamine-anhydrous",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methylamine-anhydrous/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methylamine, Anhydrous | 74-89-5 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methylamine [Methanamine] | 74-89-5 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methylamine [Methanamine] | 74-89-5 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "f",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methylamine [Methanamine] | 74-89-5 | 10,000 | f",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Methyltrichlorosilane",
      "cas_number": "75-79-6",
      "psm_tq_lbs": "500",
      "id": "methyltrichlorosilane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/methyltrichlorosilane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Methyltrichlorosilane | 75-79-6 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "5,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyltrichlorosilane [Silane, trichloromethyl-] | 75-79-6 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyltrichlorosilane [Silane, trichloromethyl-] | 75-79-6 | 5,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Methyltrichlorosilane [Silane, trichloromethyl-] | 75-79-6 | 5,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Nickel Carbonly (Nickel Tetracarbonyl)",
      "cas_number": "13463-39-3",
      "psm_tq_lbs": "150",
      "id": "nickel-carbonly-nickel-tetracarbonyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nickel-carbonly-nickel-tetracarbonyl/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nickel Carbonly (Nickel Tetracarbonyl) | 13463-39-3 | 150",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "1,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nickel carbonyl | 13463-39-3 | 1,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nickel carbonyl | 13463-39-3 | 1,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nickel carbonyl | 13463-39-3 | 1,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Nitric Acid (94.5% by weight or greater)",
      "cas_number": "7697-37-2",
      "psm_tq_lbs": "500",
      "id": "nitric-acid-94-5-by-weight-or-greater",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitric-acid-94-5-by-weight-or-greater/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitric Acid (94.5% by weight or greater) | 7697-37-2 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "15,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nitric acid (conc 80% or greater) | 7697-37-2 | 15,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nitric acid (conc 80% or greater) | 7697-37-2 | 15,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nitric acid (conc 80% or greater) | 7697-37-2 | 15,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Nitric Oxide",
      "cas_number": "10102-43-9",
      "psm_tq_lbs": "250",
      "id": "nitric-oxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitric-oxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitric Oxide | 10102-43-9 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nitric oxide [Nitrogen oxide (NO)] | 10102-43-9 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nitric oxide [Nitrogen oxide (NO)] | 10102-43-9 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Nitric oxide [Nitrogen oxide (NO)] | 10102-43-9 | 10,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Nitroaniline (para Nitroaniline",
      "cas_number": "100-01-6",
      "psm_tq_lbs": "5000",
      "id": "nitroaniline-para-nitroaniline",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitroaniline-para-nitroaniline/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitroaniline (para Nitroaniline | 100-01-6 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Nitrogen Dioxide",
      "cas_number": "10102-44-0",
      "psm_tq_lbs": "250",
      "id": "nitrogen-dioxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitrogen-dioxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitrogen Dioxide | 10102-44-0 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Nitrogen Oxides (NO; NO2; N204; N203)",
      "cas_number": "10102-44-0",
      "psm_tq_lbs": "250",
      "id": "nitrogen-oxides-no-no2-n204-n203",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitrogen-oxides-no-no2-n204-n203/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitrogen Oxides (NO; NO2; N204; N203) | 10102-44-0 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Nitrogen Tetroxide (also called Nitrogen Peroxide)",
      "cas_number": "10544-72-6",
      "psm_tq_lbs": "250",
      "id": "nitrogen-tetroxide-also-called-nitrogen-peroxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitrogen-tetroxide-also-called-nitrogen-peroxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitrogen Tetroxide (also called Nitrogen Peroxide) | 10544-72-6 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Nitrogen Trifluoride",
      "cas_number": "7783-54-2",
      "psm_tq_lbs": "5000",
      "id": "nitrogen-trifluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitrogen-trifluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitrogen Trifluoride | 7783-54-2 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Nitrogen Trioxide",
      "cas_number": "10544-73-7",
      "psm_tq_lbs": "250",
      "id": "nitrogen-trioxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitrogen-trioxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitrogen Trioxide | 10544-73-7 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Nitromethane",
      "cas_number": "75-52-5",
      "psm_tq_lbs": "2500",
      "id": "nitromethane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/nitromethane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Nitromethane | 75-52-5 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Oleum (65% to 80% by weight; also called Fuming Sulfuric Acid)",
      "cas_number": "8014-95-7",
      "psm_tq_lbs": "1,000",
      "id": "oleum-65-to-80-by-weight-also-called-fuming-sulfuric-acid",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/oleum-65-to-80-by-weight-also-called-fuming-sulfuric-acid/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Oleum (65% to 80% by weight; also called Fuming Sulfuric Acid) | 8014-95-7 | 1,000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "8014-95-7 | Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide] 1 | 10,000 | e | 10025-87-3 | Phosphorus oxychloride [Phosphoryl chloride] | 5,000 | b | 10049-04-4 | Chlorine dioxide [Chlorine oxide (ClO 2 )] | 1,000 | c | 10102-43-9 | Nitric oxide [Nitrogen oxide (NO)] | 10,000 | b | 10294-34-5 | Boron trichloride [Borane, trichloro-] | 5,000 | b | 13463-39-3 | Nickel carbonyl | 1,000 | b | 13463-40-6 | Iron, pentacarbonyl- [Iron carbonyl (Fe(CO) 5 ), (TB-5-11)-] | 2,500 | b | 19287-45-7 | Diborane | 2,500 | b | 26471-62-5 | Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-1] 1 | 10,000 | a | 1 The mixture exemption in <https://www.ecfr.gov/current/title-40/section-68.115#p-68.115(b)(1)> \u00a7 68.115(b)(1) does not apply to the substance. | Note: Basis for Listing: | a Mandated for listing by Congress. | b On EHS list, vapor pressure 10 mmHg or greater. | c Toxic gas.",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "8014-95-7 | Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide] 1 | 10,000 | e | 10025-87-3 | Phosphorus oxychloride [Phosphoryl chloride] | 5,000 | b | 10049-04-4 | Chlorine dioxide [Chlorine oxide (ClO 2 )] | 1,000 | c | 10102-43-9 | Nitric oxide [Nitrogen oxide (NO)] | 10,000 | b | 10294-34-5 | Boron trichloride [Borane, trichloro-] | 5,000 | b | 13463-39-3 | Nickel carbonyl | 1,000 | b | 13463-40-6 | Iron, pentacarbonyl- [Iron carbonyl (Fe(CO) 5 ), (TB-5-11)-] | 2,500 | b | 19287-45-7 | Diborane | 2,500 | b | 26471-62-5 | Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-1] 1 | 10,000 | a | 1 The mixture exemption in <https://www.ecfr.gov/current/title-40/section-68.115#p-68.115(b)(1)> \u00a7 68.115(b)(1) does not apply to the substance. | Note: Basis for Listing: | a Mandated for listing by Congress. | b On EHS list, vapor pressure 10 mmHg or greater. | c Toxic gas.",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "e",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "8014-95-7 | Oleum (Fuming Sulfuric acid) [Sulfuric acid, mixture with sulfur trioxide] 1 | 10,000 | e | 10025-87-3 | Phosphorus oxychloride [Phosphoryl chloride] | 5,000 | b | 10049-04-4 | Chlorine dioxide [Chlorine oxide (ClO 2 )] | 1,000 | c | 10102-43-9 | Nitric oxide [Nitrogen oxide (NO)] | 10,000 | b | 10294-34-5 | Boron trichloride [Borane, trichloro-] | 5,000 | b | 13463-39-3 | Nickel carbonyl | 1,000 | b | 13463-40-6 | Iron, pentacarbonyl- [Iron carbonyl (Fe(CO) 5 ), (TB-5-11)-] | 2,500 | b | 19287-45-7 | Diborane | 2,500 | b | 26471-62-5 | Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-1] 1 | 10,000 | a | 1 The mixture exemption in <https://www.ecfr.gov/current/title-40/section-68.115#p-68.115(b)(1)> \u00a7 68.115(b)(1) does not apply to the substance. | Note: Basis for Listing: | a Mandated for listing by Congress. | b On EHS list, vapor pressure 10 mmHg or greater. | c Toxic gas.",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Osmium Tetroxide",
      "cas_number": "20816-12-0",
      "psm_tq_lbs": "100",
      "id": "osmium-tetroxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/osmium-tetroxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Osmium Tetroxide | 20816-12-0 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Oxygen Difluoride (Fluorine Monoxide)",
      "cas_number": "7783-41-7",
      "psm_tq_lbs": "100",
      "id": "oxygen-difluoride-fluorine-monoxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/oxygen-difluoride-fluorine-monoxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Oxygen Difluoride (Fluorine Monoxide) | 7783-41-7 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Ozone",
      "cas_number": "10028-15-6",
      "psm_tq_lbs": "100",
      "id": "ozone",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/ozone/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Ozone | 10028-15-6 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Pentaborane",
      "cas_number": "19624-22-7",
      "psm_tq_lbs": "100",
      "id": "pentaborane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/pentaborane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Pentaborane | 19624-22-7 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Pentane",
      "cas_number": "109-66-0",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "pentane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/pentane/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Pentane | 109-66-0 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Peracetic Acid (concentration >60% Acetic Acid; also called Peroxyacetic Acid)",
      "cas_number": "79-21-0",
      "psm_tq_lbs": "1000",
      "id": "peracetic-acid-concentration-60-acetic-acid-also-called-peroxyacetic-acid",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/peracetic-acid-concentration-60-acetic-acid-also-called-peroxyacetic-acid/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Peracetic Acid (concentration >60% Acetic Acid; also called Peroxyacetic Acid) | 79-21-0 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Peracetic acid [Ethaneperoxoic acid]",
      "cas_number": "79-21-0",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "peracetic-acid-ethaneperoxoic-acid",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/peracetic-acid-ethaneperoxoic-acid/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Peracetic acid [Ethaneperoxoic acid] | 79-21-0 | 10,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Perchloric Acid (concentration >60% by weight)",
      "cas_number": "7601-90-3",
      "psm_tq_lbs": "5000",
      "id": "perchloric-acid-concentration-60-by-weight",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/perchloric-acid-concentration-60-by-weight/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Perchloric Acid (concentration >60% by weight) | 7601-90-3 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Perchloromethyl Mercaptan",
      "cas_number": "594-42-3",
      "psm_tq_lbs": "150",
      "id": "perchloromethyl-mercaptan",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/perchloromethyl-mercaptan/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Perchloromethyl Mercaptan | 594-42-3 | 150",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Perchloromethylmercaptan [Methanesulfenyl chloride, trichloro-] | 594-42-3 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Perchloromethylmercaptan [Methanesulfenyl chloride, trichloro-] | 594-42-3 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Perchloromethylmercaptan [Methanesulfenyl chloride, trichloro-] | 594-42-3 | 10,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Perchloryl Fluoride",
      "cas_number": "7616-94-6",
      "psm_tq_lbs": "5000",
      "id": "perchloryl-fluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/perchloryl-fluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Perchloryl Fluoride | 7616-94-6 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Peroxyacetic Acid (concentration >60% Acetic Acid; also called Peracetic Acid)",
      "cas_number": "79-21-0",
      "psm_tq_lbs": "1000",
      "id": "peroxyacetic-acid-concentration-60-acetic-acid-also-called-peracetic-acid",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/peroxyacetic-acid-concentration-60-acetic-acid-also-called-peracetic-acid/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Peroxyacetic Acid (concentration >60% Acetic Acid; also called Peracetic Acid) | 79-21-0 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Phosgene (also called Carbonyl Chloride)",
      "cas_number": "75-44-5",
      "psm_tq_lbs": "100",
      "id": "phosgene-also-called-carbonyl-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/phosgene-also-called-carbonyl-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Phosgene (also called Carbonyl Chloride) | 75-44-5 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Phosgene [Carbonic dichloride]",
      "cas_number": "75-44-5",
      "rmp_tq_lbs": "500",
      "rmp_category": "toxic",
      "rmp_basis": "a, b",
      "id": "phosgene-carbonic-dichloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/phosgene-carbonic-dichloride/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Phosgene [Carbonic dichloride] | 75-44-5 | 500 | a, b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Phosphine",
      "cas_number": "7803-51-2",
      "rmp_tq_lbs": "5,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "phosphine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/phosphine/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Phosphine | 7803-51-2 | 5,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ],
      "also_reported": [
        {
          "field": "psm_tq_lbs",
          "value": "100",
          "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
          "source_quote": "Phosphine (Hydrogen Phosphide) | 7803-51-2 | 100",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Phosphorus Oxychloride (also called Phosphoryl Chloride)",
      "cas_number": "10025-87-3",
      "psm_tq_lbs": "1000",
      "id": "phosphorus-oxychloride-also-called-phosphoryl-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/phosphorus-oxychloride-also-called-phosphoryl-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Phosphorus Oxychloride (also called Phosphoryl Chloride) | 10025-87-3 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Phosphorus oxychloride [Phosphoryl chloride]",
      "cas_number": "10025-87-3",
      "rmp_tq_lbs": "5,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "phosphorus-oxychloride-phosphoryl-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/phosphorus-oxychloride-phosphoryl-chloride/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Phosphorus oxychloride [Phosphoryl chloride] | 10025-87-3 | 5,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Phosphorus Trichloride",
      "cas_number": "7719-12-2",
      "psm_tq_lbs": "1000",
      "id": "phosphorus-trichloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/phosphorus-trichloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Phosphorus Trichloride | 7719-12-2 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "15,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Phosphorus trichloride [Phosphorous trichloride] | 7719-12-2 | 15,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Phosphorus trichloride [Phosphorous trichloride] | 7719-12-2 | 15,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Phosphorus trichloride [Phosphorous trichloride] | 7719-12-2 | 15,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Phosphoryl Chloride (also called Phosphorus Oxychloride)",
      "cas_number": "10025-87-3",
      "psm_tq_lbs": "1000",
      "id": "phosphoryl-chloride-also-called-phosphorus-oxychloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/phosphoryl-chloride-also-called-phosphorus-oxychloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Phosphoryl Chloride (also called Phosphorus Oxychloride) | 10025-87-3 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Piperidine",
      "cas_number": "110-89-4",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "piperidine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/piperidine/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Piperidine | 110-89-4 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Propadiene [1,2-Propadiene]",
      "cas_number": "463-49-0",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "propadiene-1-2-propadiene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propadiene-1-2-propadiene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Propadiene [1,2-Propadiene] | 463-49-0 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Propane",
      "cas_number": "74-98-6",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "propane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propane/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Propane | 74-98-6 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Propargyl Bromide",
      "cas_number": "106-96-7",
      "psm_tq_lbs": "100",
      "id": "propargyl-bromide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propargyl-bromide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Propargyl Bromide | 106-96-7 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Propionitrile [Propanenitrile]",
      "cas_number": "107-12-0",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "propionitrile-propanenitrile",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propionitrile-propanenitrile/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Propionitrile [Propanenitrile] | 107-12-0 | 10,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Propyl chloroformate [Carbonochloridic acid, propylester]",
      "cas_number": "109-61-5",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "propyl-chloroformate-carbonochloridic-acid-propylester",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propyl-chloroformate-carbonochloridic-acid-propylester/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Propyl chloroformate [Carbonochloridic acid, propylester] | 109-61-5 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Propyl Nitrate",
      "cas_number": "627-3-4",
      "psm_tq_lbs": "2500",
      "id": "propyl-nitrate",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propyl-nitrate/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Propyl Nitrate | 627-3-4 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Propylene [1-Propene]",
      "cas_number": "115-07-1",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "propylene-1-propene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propylene-1-propene/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Propylene [1-Propene] | 115-07-1 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Propylene oxide [Oxirane, methyl-]",
      "cas_number": "75-56-9",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "propylene-oxide-oxirane-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propylene-oxide-oxirane-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Propylene oxide [Oxirane, methyl-] | 75-56-9 | 10,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Propyleneimine [Aziridine, 2-methyl-]",
      "cas_number": "75-55-8",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "propyleneimine-aziridine-2-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propyleneimine-aziridine-2-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Propyleneimine [Aziridine, 2-methyl-] | 75-55-8 | 10,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Propyne [1-Propyne]",
      "cas_number": "74-99-7",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "propyne-1-propyne",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/propyne-1-propyne/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Propyne [1-Propyne] | 74-99-7 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Sarin",
      "cas_number": "107-44-8",
      "psm_tq_lbs": "100",
      "id": "sarin",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/sarin/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Sarin | 107-44-8 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Selenium Hexafluoride",
      "cas_number": "7783-79-1",
      "psm_tq_lbs": "1000",
      "id": "selenium-hexafluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/selenium-hexafluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Selenium Hexafluoride | 7783-79-1 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Silane",
      "cas_number": "7803-62-5",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "silane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/silane/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Silane | 7803-62-5 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Stibine (Antimony Hydride)",
      "cas_number": "7803-52-3",
      "psm_tq_lbs": "500",
      "id": "stibine-antimony-hydride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/stibine-antimony-hydride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Stibine (Antimony Hydride) | 7803-52-3 | 500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Sulfur dioxide (anhydrous)",
      "cas_number": "7446-09-5",
      "rmp_tq_lbs": "5,000",
      "rmp_category": "toxic",
      "rmp_basis": "a, b",
      "id": "sulfur-dioxide-anhydrous",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/sulfur-dioxide-anhydrous/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Sulfur dioxide (anhydrous) | 7446-09-5 | 5,000 | a, b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ],
      "also_reported": [
        {
          "field": "psm_tq_lbs",
          "value": "1000",
          "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
          "source_quote": "Sulfur Dioxide (liquid) | 7446-09-5 | 1000",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Sulfur Pentafluoride",
      "cas_number": "5714-22-7",
      "psm_tq_lbs": "250",
      "id": "sulfur-pentafluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/sulfur-pentafluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Sulfur Pentafluoride | 5714-22-7 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Sulfur Tetrafluoride",
      "cas_number": "7783-60-0",
      "psm_tq_lbs": "250",
      "id": "sulfur-tetrafluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/sulfur-tetrafluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Sulfur Tetrafluoride | 7783-60-0 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "2,500",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Sulfur tetrafluoride [Sulfur fluoride (SF4), (T-4)-] | 7783-60-0 | 2,500 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Sulfur tetrafluoride [Sulfur fluoride (SF4), (T-4)-] | 7783-60-0 | 2,500 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Sulfur tetrafluoride [Sulfur fluoride (SF4), (T-4)-] | 7783-60-0 | 2,500 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Sulfur trioxide",
      "cas_number": "7446-11-9",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "a, b",
      "id": "sulfur-trioxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/sulfur-trioxide/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Sulfur trioxide | 7446-11-9 | 10,000 | a, b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Sulfur Trioxide (also called Sulfuric Anhydride)",
      "cas_number": "7446-11-9",
      "psm_tq_lbs": "1000",
      "id": "sulfur-trioxide-also-called-sulfuric-anhydride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/sulfur-trioxide-also-called-sulfuric-anhydride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Sulfur Trioxide (also called Sulfuric Anhydride) | 7446-11-9 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Sulfuric Anhydride (also called Sulfur Trioxide)",
      "cas_number": "7446-11-9",
      "psm_tq_lbs": "1000",
      "id": "sulfuric-anhydride-also-called-sulfur-trioxide",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/sulfuric-anhydride-also-called-sulfur-trioxide/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Sulfuric Anhydride (also called Sulfur Trioxide) | 7446-11-9 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Tellurium Hexafluoride",
      "cas_number": "7783-80-4",
      "psm_tq_lbs": "250",
      "id": "tellurium-hexafluoride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/tellurium-hexafluoride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Tellurium Hexafluoride | 7783-80-4 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Tetrafluoroethylene",
      "cas_number": "116-14-3",
      "psm_tq_lbs": "5000",
      "id": "tetrafluoroethylene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/tetrafluoroethylene/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Tetrafluoroethylene | 116-14-3 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Tetrafluoroethylene [Ethene, tetrafluoro-] | 116-14-3 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Tetrafluoroethylene [Ethene, tetrafluoro-] | 116-14-3 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "f",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Tetrafluoroethylene [Ethene, tetrafluoro-] | 116-14-3 | 10,000 | f",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Tetrafluorohydrazine",
      "cas_number": "10036-47-2",
      "psm_tq_lbs": "5000",
      "id": "tetrafluorohydrazine",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/tetrafluorohydrazine/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Tetrafluorohydrazine | 10036-47-2 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Tetramethyl Lead",
      "cas_number": "75-74-1",
      "psm_tq_lbs": "1000",
      "id": "tetramethyl-lead",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/tetramethyl-lead/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Tetramethyl Lead | 75-74-1 | 1000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Tetramethyllead [Plumbane, tetramethyl-] | 75-74-1 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "toxic",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Tetramethyllead [Plumbane, tetramethyl-] | 75-74-1 | 10,000 | b",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "b",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Tetramethyllead [Plumbane, tetramethyl-] | 75-74-1 | 10,000 | b",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Tetramethylsilane [Silane, tetramethyl-]",
      "cas_number": "75-76-3",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "tetramethylsilane-silane-tetramethyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/tetramethylsilane-silane-tetramethyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Tetramethylsilane [Silane, tetramethyl-] | 75-76-3 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Tetranitromethane [Methane, tetranitro-]",
      "cas_number": "509-14-8",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "tetranitromethane-methane-tetranitro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/tetranitromethane-methane-tetranitro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Tetranitromethane [Methane, tetranitro-] | 509-14-8 | 10,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Thionyl Chloride",
      "cas_number": "7719-09-7",
      "psm_tq_lbs": "250",
      "id": "thionyl-chloride",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/thionyl-chloride/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Thionyl Chloride | 7719-09-7 | 250",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Titanium tetrachloride [Titanium chloride (TiCl4) (T-4)-]",
      "cas_number": "7550-45-0",
      "rmp_tq_lbs": "2,500",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "titanium-tetrachloride-titanium-chloride-ticl4-t-4",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/titanium-tetrachloride-titanium-chloride-ticl4-t-4/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Titanium tetrachloride [Titanium chloride (TiCl4) (T-4)-] | 7550-45-0 | 2,500 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Toluene 2,4-diisocyanate [Benzene, 2,4-diisocyanato-1-methyl-]",
      "cas_number": "584-84-9",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "a",
      "id": "toluene-2-4-diisocyanate-benzene-2-4-diisocyanato-1-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/toluene-2-4-diisocyanate-benzene-2-4-diisocyanato-1-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Toluene 2,4-diisocyanate [Benzene, 2,4-diisocyanato-1-methyl-] 1 | 584-84-9 | 10,000 | a | Toluene 2,6-diisocyanate [Benzene, 1,3-diisocyanato-2-methyl-] 1 | 91-08-7 | 10,000 | a | Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-] 1 | 26471-62-5 | 10,000 | a | Trimethylchlorosilane [Silane, chlorotrimethyl-] | 75-77-4 | 10,000 | b | Vinyl acetate monomer [Acetic acid ethenyl ester] | 108-05-4 | 15,000 | b | 1 The mixture exemption in <https://www.ecfr.gov/current/title-40/section-68.115#p-68.115(b)(1)> \u00a7 68.115(b)(1) does not apply to the substance. | Note: Basis for Listing: | a Mandated for listing by Congress. | b On EHS list, vapor pressure 10 mmHg or greater. | c Toxic gas.",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Toluene 2,6-diisocyanate [Benzene, 1,3-diisocyanato-2-methyl-]",
      "cas_number": "91-08-7",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "a",
      "id": "toluene-2-6-diisocyanate-benzene-1-3-diisocyanato-2-methyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/toluene-2-6-diisocyanate-benzene-1-3-diisocyanato-2-methyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "10,000 | a | Toluene 2,6-diisocyanate [Benzene, 1,3-diisocyanato-2-methyl-] 1 | 91-08-7 | 10,000 | a | Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-] 1 | 26471-62-5 | 10,000 | a | Trimethylchlorosilane [Silane, chlorotrimethyl-] | 75-77-4 | 10,000 | b | Vinyl acetate monomer [Acetic acid ethenyl ester] | 108-05-4 | 15,000 | b | 1 The mixture exemption in <https://www.ecfr.gov/current/title-40/section-68.115#p-68.115(b)(1)> \u00a7 68.115(b)(1) does not apply to the substance. | Note: Basis for Listing: | a Mandated for listing by Congress. | b On EHS list, vapor pressure 10 mmHg or greater. | c Toxic gas.",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-]",
      "cas_number": "26471-62-5",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "a",
      "id": "toluene-diisocyanate-unspecified-isomer-benzene-1-3-diisocyanatomethyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/toluene-diisocyanate-unspecified-isomer-benzene-1-3-diisocyanatomethyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "10,000 | a | Toluene diisocyanate (unspecified isomer) [Benzene, 1,3-diisocyanatomethyl-] 1 | 26471-62-5 | 10,000 | a | Trimethylchlorosilane [Silane, chlorotrimethyl-] | 75-77-4 | 10,000 | b | Vinyl acetate monomer [Acetic acid ethenyl ester] | 108-05-4 | 15,000 | b | 1 The mixture exemption in <https://www.ecfr.gov/current/title-40/section-68.115#p-68.115(b)(1)> \u00a7 68.115(b)(1) does not apply to the substance. | Note: Basis for Listing: | a Mandated for listing by Congress. | b On EHS list, vapor pressure 10 mmHg or greater. | c Toxic gas.",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Trichloro (chloromethyl) Silane",
      "cas_number": "1558-25-4",
      "psm_tq_lbs": "100",
      "id": "trichloro-chloromethyl-silane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/trichloro-chloromethyl-silane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Trichloro (chloromethyl) Silane | 1558-25-4 | 100",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Trichloro (dichlorophenyl) Silane",
      "cas_number": "27137-85-5",
      "psm_tq_lbs": "2500",
      "id": "trichloro-dichlorophenyl-silane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/trichloro-dichlorophenyl-silane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Trichloro (dichlorophenyl) Silane | 27137-85-5 | 2500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Trichlorosilane",
      "cas_number": "10025-78-2",
      "psm_tq_lbs": "5000",
      "id": "trichlorosilane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/trichlorosilane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Trichlorosilane | 10025-78-2 | 5000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Trichlorosilane [Silane, trichloro-] | 10025-78-2 | 10,000 | g",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Trichlorosilane [Silane, trichloro-] | 10025-78-2 | 10,000 | g",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "g",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Trichlorosilane [Silane, trichloro-] | 10025-78-2 | 10,000 | g",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Trifluorochloroethylene",
      "cas_number": "79-38-9",
      "psm_tq_lbs": "10000",
      "id": "trifluorochloroethylene",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/trifluorochloroethylene/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Trifluorochloroethylene | 79-38-9 | 10000",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ],
      "also_reported": [
        {
          "field": "rmp_tq_lbs",
          "value": "10,000",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Trifluorochloroethylene [Ethene, chlorotrifluoro-] | 79-38-9 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_category",
          "value": "flammable",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Trifluorochloroethylene [Ethene, chlorotrifluoro-] | 79-38-9 | 10,000 | f",
          "as_of": "2026-08-15"
        },
        {
          "field": "rmp_basis",
          "value": "f",
          "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
          "source_quote": "Trifluorochloroethylene [Ethene, chlorotrifluoro-] | 79-38-9 | 10,000 | f",
          "as_of": "2026-08-15"
        }
      ],
      "disagreements": []
    },
    {
      "substance": "Trimethylamine [Methanamine, N,N-dimethyl-]",
      "cas_number": "75-50-3",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "trimethylamine-methanamine-n-n-dimethyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/trimethylamine-methanamine-n-n-dimethyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Trimethylamine [Methanamine, N,N-dimethyl-] | 75-50-3 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Trimethylchlorosilane [Silane, chlorotrimethyl-]",
      "cas_number": "75-77-4",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "trimethylchlorosilane-silane-chlorotrimethyl",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/trimethylchlorosilane-silane-chlorotrimethyl/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Trimethylchlorosilane [Silane, chlorotrimethyl-] | 75-77-4 | 10,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Trimethyoxysilane",
      "cas_number": "2487-90-3",
      "psm_tq_lbs": "1500",
      "id": "trimethyoxysilane",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/trimethyoxysilane/",
      "source": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.119AppA",
      "source_quote": "Trimethyoxysilane | 2487-90-3 | 1500",
      "verified_fields": [
        "cas_number",
        "psm_tq_lbs",
        "substance"
      ]
    },
    {
      "substance": "Vinyl acetate monomer [Acetic acid ethenyl ester]",
      "cas_number": "108-05-4",
      "rmp_tq_lbs": "15,000",
      "rmp_category": "toxic",
      "rmp_basis": "b",
      "id": "vinyl-acetate-monomer-acetic-acid-ethenyl-ester",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/vinyl-acetate-monomer-acetic-acid-ethenyl-ester/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Vinyl acetate monomer [Acetic acid ethenyl ester] | 108-05-4 | 15,000 | b",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Vinyl acetylene [1-Buten-3-yne]",
      "cas_number": "689-97-4",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "vinyl-acetylene-1-buten-3-yne",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/vinyl-acetylene-1-buten-3-yne/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Vinyl acetylene [1-Buten-3-yne] | 689-97-4 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Vinyl chloride [Ethene, chloro-]",
      "cas_number": "75-01-4",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "a, f",
      "id": "vinyl-chloride-ethene-chloro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/vinyl-chloride-ethene-chloro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Vinyl chloride [Ethene, chloro-] | 75-01-4 | 10,000 | a, f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Vinyl ethyl ether [Ethene, ethoxy-]",
      "cas_number": "109-92-2",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "vinyl-ethyl-ether-ethene-ethoxy",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/vinyl-ethyl-ether-ethene-ethoxy/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Vinyl ethyl ether [Ethene, ethoxy-] | 109-92-2 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Vinyl fluoride [Ethene, fluoro-]",
      "cas_number": "75-02-5",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "vinyl-fluoride-ethene-fluoro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/vinyl-fluoride-ethene-fluoro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Vinyl fluoride [Ethene, fluoro-] | 75-02-5 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Vinyl methyl ether [Ethene, methoxy-]",
      "cas_number": "107-25-5",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "vinyl-methyl-ether-ethene-methoxy",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/vinyl-methyl-ether-ethene-methoxy/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Vinyl methyl ether [Ethene, methoxy-] | 107-25-5 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Vinylidene chloride [Ethene, 1,1-dichloro-]",
      "cas_number": "75-35-4",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "g",
      "id": "vinylidene-chloride-ethene-1-1-dichloro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/vinylidene-chloride-ethene-1-1-dichloro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Vinylidene chloride [Ethene, 1,1-dichloro-] | 75-35-4 | 10,000 | g",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    },
    {
      "substance": "Vinylidene fluoride [Ethene, 1,1-difluoro-]",
      "cas_number": "75-38-7",
      "rmp_tq_lbs": "10,000",
      "rmp_category": "flammable",
      "rmp_basis": "f",
      "id": "vinylidene-fluoride-ethene-1-1-difluoro",
      "url": "https://referencesource.org/psm-rmp-chemical-threshold-crossref/vinylidene-fluoride-ethene-1-1-difluoro/",
      "source": "https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-68/subpart-F/section-68.130",
      "source_quote": "Vinylidene fluoride [Ethene, 1,1-difluoro-] | 75-38-7 | 10,000 | f",
      "verified_fields": [
        "cas_number",
        "rmp_basis",
        "rmp_tq_lbs",
        "substance"
      ],
      "derived_fields": [
        "rmp_category"
      ]
    }
  ]
}