Records 1–400 — US workplace chemical exposure limits: federal OSHA, Cal/OSHA and NIOSH, side by side

Records 1 to 400 of 1,030. Each links to its own page, which carries the source URL and the quoted line that states the value.

• 1,1,1,2-Tetrachloro-2,2-difluoroethane1,1,1,2-Tetrachloro-2,2-difluoroethane | 76-11-9 | 500 | 4170 | - |
• 1,1,1,2-TetrachloroethaneNIOSH REL Handle with caution in the workplace. See Appendix C (Chloroethanes)
• 1,1,1,-Trichloro-2,2-bis(p-chlorophenyl)ethane; see DDT50293 | | 1,1,1,-Trichloro-2,2-bis(p-chlorophenyl)ethane; see DDT
• 1,1,1-Trichloroethane; see Methyl chloroform71556 | | 1,1,1-Trichloroethane; see Methyl chloroform
• 1,1,2,2-Tetrabromoethane; see Acetylene tetrabromide79276 | | 1,1,2,2-Tetrabromoethane; see Acetylene tetrabromide
• 1,1,2,2-Tetrachloro-1,2-difluoroethane1,1,2,2-Tetrachloro-1,2-difluoroethane | 76-12-0 | 500 | 4170 | - |
• 1,1,2,2-Tetrachloro-1,2-difluoroethane; fluorocarbon 11276120 | | 1,1,2,2-Tetrachloro-1,2-difluoroethane; fluorocarbon 112 | 500 | 4,170
• 1,1,2,2-Tetrachloroethane1,1,2,2-Tetrachloroethane | 79-34-5 | 5 | 35 | X |
• 1,1,2,2-Tetrachloroethane; acetylene tetrachloride79345 | S | 1,1,2,2-Tetrachloroethane; acetylene tetrachloride | 1 | 7
• 1,1,2-Trichloro-1,2,2-trifluoroethane1,1,2-Trichloro-1,2,2-trifluoroethane | 76-13-1 | 1000 | 7600 | - |
• 1,1,2-Trichloroethane1,1,2-Trichloroethane | 79-00-5 | 10 | 45 | X |
• 1,1-Dichloro-1-nitroethane1,1-Dichloro-1-nitroethane | 594-72-9 | (C)10 | (C)60 | - |
• 1,1-Dichloroethane1,1-Dichloroethane | 75-34-3 | 100 | 400 | - |
• 1,1-Dichloroethylene; see Vinylidene chloride75354 | | 1,1-Dichloroethylene; see Vinylidene chloride
• 1,1-Dimethylhydrazine1,1-Dimethylhydrazine | 57-14-7 | 0.5 | 1 | X |
• 1,2,3-Trichloropropane1,2,3-Trichloropropane | 96-18-4 | 50 | 300 | - |
• 1,2,3-TrimethylbenzeneNIOSH REL TWA 25 ppm (125 mg/m3)
• 1,2,4-Trichlorobenzene120821 | | 1,2,4-Trichlorobenzene | 5 | 40 | C
• 1,2,4-TrimethylbenzeneNIOSH REL TWA 25 ppm (125 mg/m3)
• 1,2-Diaminoethane; see Ethylenediamine Diatomacous earth; see Silica-amorphous107153 | | 1,2-Diaminoethane; see Ethylenediamine Diatomacous earth; see Silica-amorphous
• 1,2-Dibromo-3-chloropropaneNIOSH REL Ca See Appendix A
• 1,2-Dibromoethane; see Ethylene dibromide, Section 5219106934 | S | 1,2-Dibromoethane; see Ethylene dibromide, Section 5219
• 1,2-Dichloroethane, see Ethylene dichloride107062 | | 1,2-Dichloroethane, see Ethylene dichloride
• 1,2-Dichloroethylene1,2-Dichloroethylene | 540-59-0 | 200 | 790 | - |
• 1,2-Dichloroethylene; acetylene dichloride540590 | | 1,2-Dichloroethylene; acetylene dichloride | 200 | 790
• 1,2-Dichloropropane; see Propylene dichloride78875 | | 1,2-Dichloropropane; see Propylene dichloride
• 1,2-Dichlorotetrafluoroethane; Fluorocarbon 11476142 | | 1,2-Dichlorotetrafluoroethane; Fluorocarbon 114 | 1,000 | 7,000
• 1,2-Epoxypropane; see Propylene oxide75569 | | 1,2-Epoxypropane; see Propylene oxide
• 1,3,5-Triglycidyl-s-triazinetrione2451629 | | 1,3,5-Triglycidyl-s-triazinetrione | | 0.005
• 1,3,5-TrimethylbenzeneNIOSH REL TWA 25 ppm (125 mg/m3)
• 1,3-ButadieneNIOSH REL Ca See Appendix A
• 1,3-Dichloro-5,5-dimethyl hydantoin1,3-Dichloro-5,5-dimethyl hydantoin | 118-52-5 | - | 0.2 | - |
• 1,3-DichloropropeneNIOSH REL Ca TWA 1 ppm (5 mg/m3) [skin]
• 1,3-Dimethylbutyl acetate; see sec-Hexyl acetate108849 | | 1,3-Dimethylbutyl acetate; see sec-Hexyl acetate
• 1,4-Dichloro-2-butene764410 | S | 1,4-Dichloro-2-butene | 0.005 | 0.025
• 1,4-Diethylene dioxide; see p-Dioxane123911 | | 1,4-Diethylene dioxide; see p-Dioxane
• 1,6-Hexanediamine124094 | | 1,6-Hexanediamine | 0.5 | 2.3
• 1-bromopropane, n-propyl bromide106945 | S | 1-bromopropane, n-propyl bromide | 5 | 25
• 1-Butanethiol; see Butyl mercaptan109795 | | 1-Butanethiol; see Butyl mercaptan
• 1-Butanol; see n-Butyl alcohol71363 | | 1-Butanol; see n-Butyl alcohol
• 1-Chloro-1-nitropropane1-Chloro-1-nitropropane | 600-25-9 | 20 | 100 | - |
• 1-Chloro-2,3-epoxypropane; see Epichlorohydrin106898 | | 1-Chloro-2,3-epoxypropane; see Epichlorohydrin
• 1-Chloro-4-nitrobenzene; see p-Nitrochlorobenzene100005 | | 1-Chloro-4-nitrobenzene; see p-Nitrochlorobenzene
• 1-DecanethiolNIOSH REL C 0.5 ppm (3.6 mg/m3) [15-minute]
• 1-DodecanethiolNIOSH REL C 0.5 ppm (4.1 mg/m3) [15-minute]
• 1-HeptanethiolNIOSH REL C 0.5 ppm (2.7 mg/m3) [15-minute]
• 1-HexadecanethiolNIOSH REL C 0.5 ppm (5.3 mg/m3) [15-minute]
• 1-Hexene592416 | | 1-Hexene | 50 | 180
• 1-Naphthyl N-methylcarbamate; see Carbaryl63252 | | 1-Naphthyl N-methylcarbamate; see Carbaryl
• 1-Nitropropane1-Nitropropane | 108-03-2 | 25 | 90 | - |
• 1-NonanethiolNIOSH REL C 0.5 ppm (3.3 mg/m3) [15-minute]
• 1-OctadecanethiolNIOSH REL C 0.5 ppm (5.9 mg/m3) [15-minute]
• 1-OctanethiolNIOSH REL C 0.5 ppm (3.0 mg/m3) [15-minute]
• 1-PentanethiolNIOSH REL C 0.5 ppm (2.1 mg/m3) [15-minute]
• 1-PropanethiolNIOSH REL C 0.5 ppm (1.6 mg/m3) [15-minute]
• 1-UndecanethiolNIOSH REL C 0.5 ppm (3.9 mg/m3) [15-minute]
• 2,2′-Azobisisobutyronitrile decomposition product, see Tetramethyl succinonitrile3333526 | S | 2,2′-Azobisisobutyronitrile decomposition product, see Tetramethyl succinonitrile
• 2,2-Dichloropropionic acid75990 | | 2,2-Dichloropropionic acid | 1 | 6
• 2,3,7,8-Tetrachloro-dibenzo-p-dioxinNIOSH REL Ca See Appendix A
• 2,3-Epoxypropanol; see Glycidol556525 | | 2,3-Epoxypropanol; see Glycidol
• 2,4,5-TNIOSH REL TWA 10 mg/m3
• 2,4,5-T (2,4,5-trichlorophenoxyacetic acid)2,4,5-T (2,4,5-trichlorophenoxyacetic acid) | 93-76-5 | - | 10 | - |
• 2,4,5-T;2,4,5-trichlorophenoxyacetic acid Talc; see Silicates93765 | | 2,4,5-T;2,4,5-trichlorophenoxyacetic acid Talc; see Silicates | -- | 10
• 2,4,5-Trichlorophenoxyacetic acid see 2,4,5-T93765 | | 2,4,5-Trichlorophenoxyacetic acid see 2,4,5-T
• 2,4,6-Trinitrophenol; see Picric acid88891 | | 2,4,6-Trinitrophenol; see Picric acid
• 2,4,6-Trinitrophenylmethyl nitramine; see Tetryl479458 | | 2,4,6-Trinitrophenylmethyl nitramine; see Tetryl
• 2,4,6-TrinitrotolueneNIOSH REL TWA 0.5 mg/m3 [skin]
• 2,4,6-Trinitrotoluene (TNT)2,4,6-Trinitrotoluene (TNT) | 118-96-7 | - | 1.5 | X |
• 2,4,6-Trinitrotoluene; TNT118967 | S | 2,4,6-Trinitrotoluene; TNT | -- | 0.5
• 2,4-DNIOSH REL TWA 10 mg/m3
• 2,4-Diaminoanisole (and its salts)NIOSH REL Ca Minimize occupational exposure (especially skin exposures) See Appendix A
• 2,4-Dinitrotoluene25321146 | S | 2,4-Dinitrotoluene | -- | 0.15
• 2,6-Di-tert-butyl-p-cresol128370 | | 2,6-Di-tert-butyl-p-cresol | -- | 10
• 2,6-Dimethyl-4-heptanone; see Diisobutyl ketone108838 | | 2,6-Dimethyl-4-heptanone; see Diisobutyl ketone
• 2-AcetylaminofluoreneNIOSH REL Ca See Appendix A
• 2-Aminoethanol; see Ethanolamine141435 | | 2-Aminoethanol; see Ethanolamine
• 2-Aminonapthalene; see beta-Naphthylamine, Section 520991598 | | 2-Aminonapthalene; see beta-Naphthylamine, Section 5209
• 2-Aminopyridine2-Aminopyridine | 504-29-0 | 0.5 | 2 | - |
• 2-ButanoneNIOSH REL TWA 200 ppm (590 mg/m3) ST 300 ppm (885 mg/m3)
• 2-Butanone (Methyl ethyl ketone)2-Butanone (Methyl ethyl ketone) | 78-93-3 | 200 | 590 | - |
• 2-Butanone; see Methyl ethyl ketone78933 | | 2-Butanone; see Methyl ethyl ketone
• 2-Butoxyethanol2-Butoxyethanol | 111-76-2 | 50 | 240 | X |
• 2-Butoxyethanol acetateNIOSH REL TWA 5 ppm (33 mg/m3)
• 2-Butoxyethanol (EGBE)111762 | S | 2-Butoxyethanol (EGBE) | 20 | 97
• 2-Chloro-1,3-butadiene; see Chloroprene126998 | S | 2-Chloro-1,3-butadiene; see Chloroprene
• 2-Chloro-6-(trichloromethyl) pyridine2-Chloro-6-(trichloromethyl) pyridine | 1929-82-4 | - | - | - |
• 2-Chloro-6-trichloromethyl pyridineNIOSH REL TWA 10 mg/m3 (total) ST 20 mg/m3 (total) TWA 5 mg/m3 (resp)
• 2-Chloro-6-(trichloromethyl)pyridine; see Nitrapyrin1929824 | | 2-Chloro-6-(trichloromethyl)pyridine; see Nitrapyrin | --
• 2-Chloroethanol; see Ethylene chlorohydrin107073 | | 2-Chloroethanol; see Ethylene chlorohydrin
• 2-Chloropropionic acid598787 | S | 2-Chloropropionic acid | 0.1 | 0.44
• 2-(Diethylamino) ethanol100378 | S | 2-(Diethylamino) ethanol | 2 | 9.6
• 2-Ethoxyethanol110805 | S | 2-Ethoxyethanol | 5 | 18
• 2-Ethoxyethanol (Cellosolve)2-Ethoxyethanol (Cellosolve) | 110-80-5 | 200 | 740 | X |
• 2-Ethoxyethyl acetate111159 | S | 2-Ethoxyethyl acetate | 5 | 27
• 2-HexanoneNIOSH REL TWA 1 ppm (4 mg/m3)
• 2-Hexanone (Methyl n-butyl ketone)2-Hexanone (Methyl n-butyl ketone) | 591-78-6 | 100 | 410 | - |
• 2-Hexanone; see Methyl butyl ketone591786 | | 2-Hexanone; see Methyl butyl ketone
• 2-Hydroxypropyl acrylate999611 | S | 2-Hydroxypropyl acrylate | 0.5 | 3
• 2-IsopropoxyethanolNIOSH REL See Appendix D
• 2-Methoxyethanol109864 | S | 2-Methoxyethanol | 5 | 16
• 2-Methoxyethanol (Methyl cellosolve)2-Methoxyethanol (Methyl cellosolve) | 109-86-4 | 25 | 80 | X |
• 2-Methoxyethyl acetate110496 | | 2-Methoxyethyl acetate | 5 | 24
• 2-Methoxyethyl acetate (Methyl cellosolve acetate)2-Methoxyethyl acetate (Methyl cellosolve acetate) | 110-49-6 | 25 | 120 | X |
• 2-Methylbutyl acetate; see Pentyl acetate624419 | | 2-Methylbutyl acetate; see Pentyl acetate
• 2-Methylcyclopentadienyl manganese tricarbonyl, as Mn12108133 | S | 2-Methylcyclopentadienyl manganese tricarbonyl, as Mn | -- | 0.2
• 2-N-Dibutylaminoethanol102818 | S | 2-N-Dibutylaminoethanol | 2 | 14
• 2-NitronaphthaleneNIOSH REL Ca* See Appendix A
• 2-Nitropropane2-Nitropropane | 79-46-9 | 25 | 90 | - |
• 2-PentanoneNIOSH REL TWA 150 ppm (530 mg/m3)
• 2-Pentanone (Methyl propyl ketone)2-Pentanone (Methyl propyl ketone) | 107-87-9 | 200 | 700 | - |
• 2-Pentanone; see Methyl propyl ketone107879 | | 2-Pentanone; see Methyl propyl ketone
• 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 520991941 | S | 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209
• 3-Amyl acetate; see Pentyl acetate620111 | | 3-Amyl acetate; see Pentyl acetate
• 4,4′-Methylene bis(2-chloroaniline), see also Section 5215101144 | S | 4,4′-Methylene bis(2-chloroaniline), see also Section 5215 | -- | 0.01
• 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200)101779 | S | 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200) | 0.01 | 0.08 | | 0.1 | 0.8
• 4,4'-MethylenedianilineNIOSH REL Ca See Appendix A
• 4,4′-Thiobis (6-tert, Butyl-m-cresol)4,4′-Thiobis (6-tert, Butyl-m-cresol) | 96-69-5 | - | - | - |
• 4,6-Dinitro-o-cresol; 2-methyl-4,6-dinitrophenol534521 | S | 4,6-Dinitro-o-cresol; 2-methyl-4,6-dinitrophenol | -- | 0.2
• 4-AminodiphenylNIOSH REL Ca See Appendix A
• 4-DimethylaminoazobenzeneNIOSH REL Ca See Appendix A
• 4-Methoxyphenol150765 | | 4-Methoxyphenol | -- | 5
• 4-NitrobiphenylNIOSH REL Ca See Appendix A
• 4-Vinyl cyclohexene100403 | S | 4-Vinyl cyclohexene | 0.1 | 0.4
• 5-Methyl-3-heptanoneNIOSH REL TWA 25 ppm (130 mg/m3)
• a-Chloroacetophenone (Phenacyl chloride)a-Chloroacetophenone (Phenacyl chloride) | 532-27-4 | 0.05 | 0.3 | - |
• AcetaldehydeAcetaldehyde | 75-07-0 | 200 | 360 | - |
• Acetic acidAcetic acid | 64-19-7 | 10 | 25 | - |
• Acetic anhydrideAcetic anhydride | 108-24-7 | 5 | 20 | - |
• AcetoneAcetone | 67-64-1 | 1000 | 2400 | - |
• Acetone cyanohydrinNIOSH REL C 1 ppm (4 mg/m3) [15-minute]
• AcetonitrileAcetonitrile | 75-05-8 | 40 | 70 | - |
• Acetophenone98862 | | Acetophenone | 10 | 49
• Acetylene74862 | | Acetylene | (h)
• Acetylene dichloride; see 1,2-Dichloroethylene540590 | | Acetylene dichloride; see 1,2-Dichloroethylene
• Acetylene tetrabromideAcetylene tetrabromide | 79-27-6 | 1 | 14 | - |
• Acetylene tetrabromide: 1,1,2,2-tetrabromoethane79276 | | Acetylene tetrabromide: 1,1,2,2-tetrabromoethane | 1 | 14
• Acetylene tetrachloride; see 1,1,2,2-Tetrachloroethane79345 | | Acetylene tetrachloride; see 1,1,2,2-Tetrachloroethane
• Acetylsalicylic acidNIOSH REL TWA 5 mg/m3
• AcroleinAcrolein | 107-02-8 | 0.1 | 0.25 | - |
• AcrylamideAcrylamide | 79-06-1 | - | 0.3 | X |
• Acrylic acid79107 | S | Acrylic acid | 2 | 5.9
• AcrylonitrileNIOSH REL Ca TWA 1 ppm C 10 ppm [15-minute] [skin]
• Acrylonitrile; see 1910.1045Acrylonitrile; see 1910.1045 | 107-13-1 | - | - | - |
• Acrylonitrile; see Section 5213107131 | S | Acrylonitrile; see Section 5213 | 2 | 4.5
• Adipic acid124049 | | Adipic acid | -- | 5
• Adiponitrile111693 | S | Adiponitrile | 2 | 8.8
• AldrinAldrin | 309-00-2 | - | 0.25 | X |
• Allyl alcoholAllyl alcohol | 107-18-6 | 2 | 5 | X |
• Allyl chlorideAllyl chloride | 107-05-1 | 1 | 3 | - |
• Allyl glycidyl etherNIOSH REL TWA 5 ppm (22 mg/m3) ST 10 ppm (44 mg/m3) [skin]
• Allyl propyl disulfideAllyl propyl disulfide | 2179-59-1 | 2 | 12 | - |
• alpha-Aluminaalpha-Alumina | 1344-28-1 | - | - | - |
• alpha-Methyl styrenealpha-Methyl styrene | 98-83-9 | (C)100 | (C)480 | - |
• alpha-Methylacrylonitrile126987 | S | alpha-Methylacrylonitrile | 1 | 3
• alpha-NaphthylamineNIOSH REL Ca See Appendix A
• AluminumNIOSH REL TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
• Aluminum distearate300925 | | Aluminum distearate | -- | 10
• Aluminum stearate7047849 | | Aluminum stearate | -- | 10
• Aluminum tristearate637127 | | Aluminum tristearate | -- | 10
• Aminodimethylbenzene; see Xylidene1300738 | | Aminodimethylbenzene; see Xylidene
• Amitrole61825 | | Amitrole | -- | 0.2
• AmmoniaAmmonia | 7664-41-7 | 50 | 35 | - |
• Ammonium chloride fume12125029 | | Ammonium chloride fume | -- | 10 | | -- | 20
• Ammonium perfluorooctanoate3825261 | S | Ammonium perfluorooctanoate | -- | 0.01
• Ammonium stearate1002897 | | Ammonium stearate | -- | 10
• Ammonium sulfamateAmmonium sulfamate | 7773-06-0 | - | - | - |
• Aniline62533 | S | Aniline | 2 | 7.6
• Anisidine (o-, p-isomers)Anisidine (o-, p-isomers) | 29191-52-4 | - | 0.5 | X |
• AntimonyNIOSH REL TWA 0.5 mg/m3
• ANTUNIOSH REL TWA 0.3 mg/m3
• Argon7440371 | | Argon | (h)
• Arsenic and inorganic arsenic compounds; see also Section 52147440382 | | Arsenic and inorganic arsenic compounds; see also Section 5214 | | 0.01
• Arsenic (inorganic compounds, as As)NIOSH REL Ca C 0.002 mg/m3 [15-minute]
• Arsenic, inorganic compounds (as As); see 1910.1018Arsenic, inorganic compounds (as As); see 1910.1018 | 7440-38-2 | - | - | - |
• Arsenic, organic compounds (as As)Arsenic, organic compounds (as As) | 7440-38-2 | - | 0.5 | - |
• ArsineArsine | 7784-42-1 | 0.05 | 0.2 | - |
• AsbestosNIOSH REL Ca See Appendix A See Appendix C
• Asphalt fumesNIOSH REL Ca C 5 mg/m3 [15-minute]
• Atrazine1912249 | | Atrazine | -- | 5
• Azinphos-methylAzinphos-methyl | 86-50-0 | - | 0.2 | X |
• Barium chloride (as Ba)NIOSH REL TWA 0.5 mg/m3
• Barium nitrate (as Ba)NIOSH REL TWA 0.5 mg/m3
• Barium, soluble compounds (as Ba)Barium, soluble compounds (as Ba) | 7440-39-3 | - | 0.5 | - |
• Barium sulfateBarium sulfate | 7727-43-7 | - | - | - |
• BenomylBenomyl | 17804-35-2 | - | - | - |
• BenzeneNIOSH REL Ca TWA 0.1 ppm ST 1 ppm
• Benzene; see 1910.1028Benzene; see 1910.1028 | 71-43-2 | - | - | - |
• Benzene; see also Section 521871432 | S | Benzene; see also Section 5218 | 1 | | | 5 | --
• BenzenethiolNIOSH REL C 0.1 ppm (0.5 mg/m3) [15-minute]
• BenzidineNIOSH REL Ca See Appendix A See Appendix C
• Benzol; see Benzene71432 | | Benzol; see Benzene
• Benzoyl chloride98884 | | Benzoyl chloride | 0.2 | 1.1 | C
• Benzoyl peroxideBenzoyl peroxide | 94-36-0 | - | 5 | - |
• Benzoyl peroxide; dibenzoyl peroxide94360 | | Benzoyl peroxide; dibenzoyl peroxide | -- | 5
• Benzyl acetate140114 | | Benzyl acetate | 10 | 61
• Benzyl chlorideBenzyl chloride | 100-44-7 | 1 | 5 | - |
• Beryllium, and beryllium compounds7440417 | | Beryllium, and beryllium compounds | -- | 0.0002 | 0.025mg/M3 | -- | 0.002
• beta-Chloroprenebeta-Chloroprene | 126-99-8 | 25 | 90 | X |
• beta-NaphthylamineNIOSH REL Ca See Appendix A
• beta-Naphthylamine; 2-naphthylamine, see Section 520991598 | | beta-Naphthylamine; 2-naphthylamine, see Section 5209
• beta-Naphthylamine; see 1910.1009beta-Naphthylamine; see 1910.1009 | 91-59-8 | - | - | - |
• beta-PropiolactoneNIOSH REL Ca See Appendix A
• Biphenyl; diphenyl; phenylbenzene92524 | | Biphenyl; diphenyl; phenylbenzene | 0.2 | 1.5
• bis(2-(Dimethylamino)ethyl)etherNIOSH REL See Appendix C (NIAX® Catalyst ESN)
• bis-Chloromethyl etherNIOSH REL Ca See Appendix A
• bis(Chloromethyl) ether; see 1910.1008bis(Chloromethyl) ether; see 1910.1008 | 542-88-1 | - | - | - |
• bis-Chloromethyl ether, see also Section 5209542881 | | bis-Chloromethyl ether, see also Section 5209 | 0.001 | 0.005
• Bis(chloromethyl) ether, see bis-Chloromethyl ether, Section 5209542881 | | Bis(chloromethyl) ether, see bis-Chloromethyl ether, Section 5209
• Bismuth telluride1304821 | | Bismuth telluride
• Borates, tetra, sodium salts (Anhydrous)NIOSH REL TWA 1 mg/m3
• Borates, tetra, sodium salts (Decahydrate)NIOSH REL TWA 5 mg/m3
• Borates, tetra, sodium salts (Pentahydrate)NIOSH REL TWA 1 mg/m3
• Boron oxideBoron oxide | 1303-86-2 | - | - | - |
• Boron tribromide10294334 | | Boron tribromide | 1 | 10 | C
• Boron trifluorideBoron trifluoride | 7637-07-2 | (C)1 | (C)3 | - |
• Bromacil314409 | | Bromacil | 1 | 10
• BromineBromine | 7726-95-6 | 0.1 | 0.7 | - |
• Bromine pentafluoride7789302 | | Bromine pentafluoride | 0.1 | 0.7
• Bromochloromethane; see Chlorobromethane74975 | | Bromochloromethane; see Chlorobromethane
• Bromoethane; see Ethyl bromide74964 | | Bromoethane; see Ethyl bromide
• BromoformBromoform | 75-25-2 | 0.5 | 5 | X |
• Bromoform; tribromomethane75252 | S | Bromoform; tribromomethane | 0.5 | 5
• Bromomethane, see Methyl bromide74839 | | Bromomethane, see Methyl bromide
• Bromotrifluoromethane; see Trifluorobromomethane75638 | | Bromotrifluoromethane; see Trifluorobromomethane
• Butane106978 | | Butane | 800 | 1,900
• Butyl acrylate141322 | | Butyl acrylate | 2 | 11
• Butyl mercaptanButyl mercaptan | 109-79-5 | 10 | 35 | - |
• ButylamineButylamine | 109-73-9 | (C)5 | (C)15 | X |
• Cadmium (as Cd); see 1910.1027Cadmium (as Cd); see 1910.1027 | 7440-43-9 | - | - | - |
• Cadmium fume (as Cd)NIOSH REL Ca See Appendix A
• Calcium arsenate (as As)NIOSH REL Ca C 0.002 mg/m3 [15-minute]
• Calcium carbonateCalcium carbonate | 1317-65-3 | - | - | - |
• Calcium carbonateNIOSH REL TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
• Calcium carbonate; see Particulates not otherwise regulated471341 | | Calcium carbonate; see Particulates not otherwise regulated | --
• Calcium cyanamide156627 | | Calcium cyanamide | -- | 0.5
• Calcium hydroxideCalcium hydroxide | 1305-62-0 | - | - | - |
• Calcium oxideCalcium oxide | 1305-78-8 | - | 5 | - |
• Calcium silicateCalcium silicate | 1344-95-2 | - | - | - |
• Calcium stearate1592230 | | Calcium stearate | -- | 10
• Calcium sulfateCalcium sulfate | 7778-18-9 | - | - | - |
• Camphor, syntheticCamphor, synthetic | 76-22-2 | - | 2 | - |
• CaprolactamNIOSH REL Dust: TWA 1 mg/m3 ST 3 mg/m3 Vapor: TWA 0.22 ppm (1 mg/m3) ST 0.66 ppm (3 mg/m3)
• Caprolactam dust105602 | | Caprolactam dust | -- | 1 | | -- | 3
• Caprolactam vapor105602 | | Caprolactam vapor | 5 | 20 | | 10 | 40
• Captafol2425061 | S | Captafol | -- | 0.1
• Captan133062 | | Captan | -- | 5
• CarbarylNIOSH REL TWA 5 mg/m3
• Carbaryl; 1-naphthyl N-methylcarbamate63252 | | Carbaryl; 1-naphthyl N-methylcarbamate | -- | 5
• Carbaryl (Sevin)Carbaryl (Sevin) | 63-25-2 | - | 5 | - |
• Carbofuran1563662 | | Carbofuran | -- | 0.1
• Carbon blackCarbon black | 1333-86-4 | - | 3.5 | - |
• Carbon dioxideCarbon dioxide | 124-38-9 | 5000 | 9000 | - |
• Carbon disulfideCarbon disulfide | 75-15-0 | - | (2) | - |
• Carbon monoxideCarbon monoxide | 630-08-0 | 50 | 55 | - |
• Carbon tetrabromide558134 | | Carbon tetrabromide | 0.1 | 1.4 | | 0.3 | 4
• Carbon tetrachlorideCarbon tetrachloride | 56-23-5 | - | (2) | - |
• Carbonyl chloride; see Phosgene75445 | | Carbonyl chloride; see Phosgene
• Carbonyl fluoride353504 | | Carbonyl fluoride | 2 | 5 | | 5 | 15
• CatecholNIOSH REL TWA 5 ppm (20 mg/m3) [skin]
• CelluloseCellulose | 9004-34-6 | - | - | - |
• Cesium hydroxide21351791 | | Cesium hydroxide | 2
• ChlordaneChlordane | 57-74-9 | - | 0.5 | X |
• Chlorinated campheneChlorinated camphene | 8001-35-2 | - | 0.5 | X |
• Chlorinated camphene; toxaphene8001352 | S | Chlorinated camphene; toxaphene | -- | 0.5 | | -- | 1
• Chlorinated diphenyl oxideChlorinated diphenyl oxide | 55720-99-5 | - | 0.5 | - |
• ChlorineChlorine | 7782-50-5 | (C)1 | (C)3 | - |
• Chlorine dioxideChlorine dioxide | 10049-04-4 | 0.1 | 0.3 | - |
• Chlorine trifluorideChlorine trifluoride | 7790-91-2 | (C)0.1 | (C)0.4 | - |
• ChloroacetaldehydeChloroacetaldehyde | 107-20-0 | (C)1 | (C)3 | - |
• Chloroacetone78955 | S | Chloroacetone | 1 | 3.8 | C
• Chloroacetyl chloride79049 | S | Chloroacetyl chloride | 0.05 | 0.2 | | 0.15 | 0.69
• ChlorobenzeneChlorobenzene | 108-90-7 | 75 | 350 | - |
• ChlorobromomethaneChlorobromomethane | 74-97-5 | 200 | 1050 | - |
• Chlorobromomethane; bromochloromethane74975 | | Chlorobromomethane; bromochloromethane | 200 | 1,050
• ChlorodifluoromethaneNIOSH REL TWA 1000 ppm (3500 mg/m3) ST 1250 ppm (4375 mg/m3)
• Chlorodifluoromethane; Fluorocarbon 2275456 | | Chlorodifluoromethane; Fluorocarbon 22 | 1,000 | 3,500
• Chlorodiphenyl (42% chlorine)53469219 | S | Chlorodiphenyl (42% chlorine) | -- | 1
• Chlorodiphenyl (54% chlorine)11097691 | S | Chlorodiphenyl (54% chlorine) | -- | 0.5
• Chloroethane; see Ethyl chloride75003 | | Chloroethane; see Ethyl chloride
• Chloroethylene, see Vinyl chloride, Section 521075014 | | Chloroethylene, see Vinyl chloride, Section 5210
• ChloroformNIOSH REL Ca ST 2 ppm (9.78 mg/m3) [60-minute]
• Chloroform (Trichloromethane)Chloroform (Trichloromethane) | 67-66-3 | (C)50 | (C)240 | - |
• Chloroform; trichloromethane67663 | | Chloroform; trichloromethane | 2 | 9.78
• Chloromethane, see Methyl chloride74873 | | Chloromethane, see Methyl chloride
• Chloromethyl methyl etherNIOSH REL Ca See Appendix A
• Chloromethyl methyl ether; see 1910.1006Chloromethyl methyl ether; see 1910.1006 | 107-30-2 | - | - | - |
• Chloromethyl methyl ether; see Methyl chloromethyl ether, Section 5209107302 | | Chloromethyl methyl ether; see Methyl chloromethyl ether, Section 5209
• Chloropentafluoroethane76153 | | Chloropentafluoroethane | 1,000 | 6,320
• ChloropicrinChloropicrin | 76-06-2 | 0.1 | 0.7 | - |
• Chloropicrin; trichloronitromethane76062 | | Chloropicrin; trichloronitromethane | 0.1 | 0.7
• Chloroprene; 2-chloro-1,3-butadiene126998 | S | Chloroprene; 2-chloro-1,3-butadiene | 10 | 36
• Chlorpyrifos2921882 | S | Chlorpyrifos | -- | 0.2
• Chromic acid and chromatesNIOSH REL (as Cr): Ca TWA 0.0002 mg/m3 (8-hours)
• Chromium metal7440473 | | Chromium metal | -- | 0.5
• Chromyl chloride14977618 | | Chromyl chloride | 0.025 | 0.15
• ClopidolClopidol | 2971-90-6 | - | - | - |
• Coal tar pitch volatilesNIOSH REL Ca TWA 0.1 mg/m3 (cyclohexane-extractable fraction)
• Coal tar pitch volatiles (benzene soluble fraction), anthracene, BaP, phenanthrene, acridine, chrysene, pyreneCoal tar pitch volatiles (benzene soluble fraction), anthracene, BaP, phenanthrene, acridine, chrysene, pyrene | 65966-93-2 | - | 0.2 | - |
• Cobalt carbonyl (as Co)NIOSH REL TWA 0.1 mg/m3
• Cobalt hydrocarbonyl, as Co16842038 | | Cobalt hydrocarbonyl, as Co | -- | 0.1
• Cobalt metal, dust, and fume (as Co)Cobalt metal, dust, and fume (as Co) | 7440-48-4 | - | 0.1 | - |
• CopperCopper | 7440-50-8 | - | - | - |
• Copper fume (as Cu)NIOSH REL TWA 0.1 mg/m3
• Crag® herbicideNIOSH REL TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
• Crag herbicide (Sesone)Crag herbicide (Sesone) | 136-78-7 | - | - | - |
• Cresol, all isomersCresol, all isomers | 1319-77-3 | 5 | 22 | X |
• Cristobalite,14464461 | | Cristobalite, | -- | 0.05
• CrotonaldehydeNIOSH REL TWA 2 ppm (6 mg/m3)
• Crotonaldehyde; beta-methylacrolein123739 | S | Crotonaldehyde; beta-methylacrolein | | | 0.3
• Crufomate299865 | | Crufomate | -- | 5
• CumeneCumene | 98-82-8 | 50 | 245 | X |
• Cyanamide420042 | | Cyanamide | -- | 2
• Cyanogen460195 | | Cyanogen | 10 | 20
• Cyanogen chloride506774 | | Cyanogen chloride | 0.3 | 0.6 | C
• CyclohexaneCyclohexane | 110-82-7 | 300 | 1050 | - |
• CyclohexanethiolNIOSH REL C 0.5 ppm (2.4 mg/m3) [15-minute]
• CyclohexanolCyclohexanol | 108-93-0 | 50 | 200 | - |
• CyclohexanoneCyclohexanone | 108-94-1 | 50 | 200 | - |
• CyclohexeneCyclohexene | 110-83-8 | 300 | 1015 | - |
• Cyclohexylamine108918 | S | Cyclohexylamine | 10 | 40
• CycloniteNIOSH REL TWA 1.5 mg/m3 ST 3 mg/m3 [skin]
• Cyclonite; RDX; cyclotrimethylenetrinitramine121824 | S | Cyclonite; RDX; cyclotrimethylenetrinitramine | -- | 0.07
• CyclopentadieneCyclopentadiene | 542-92-7 | 75 | 200 | - |
• Cyclopentane287923 | | Cyclopentane | 600 | 1,720
• CyhexatinNIOSH REL TWA 5 mg/m3
• Cyhexatin; tricyclohexyltin hydroxide13121705 | | Cyhexatin; tricyclohexyltin hydroxide | | 5
• D-Benzoquinone; see Quinone106514 | | D-Benzoquinone; see Quinone
• DDTNIOSH REL Ca TWA 0.5 mg/m3
• DDT; 1,1,1-trichloro-2,2-bis-(p-chlorophenyl)ethane50293 | S | DDT; 1,1,1-trichloro-2,2-bis-(p-chlorophenyl)ethane | -- | 1
• DDVP, see Dichlorvos62737 | | DDVP, see Dichlorvos
• DecaboraneDecaborane | 17702-41-9 | 0.05 | 0.3 | X |
• DemetonNIOSH REL TWA 0.1 mg/m3 [skin]
• Di-(2-ethylhexyl) phthalate; see Di-sec-octyl phthalate117817 | | Di-(2-ethylhexyl) phthalate; see Di-sec-octyl phthalate
• Di-sec octyl phthalateNIOSH REL Ca TWA 5 mg/m3 ST 10 mg/m3
• Di-sec-octyl phthalate; bis(2 ethylhexyl) phthalate117817 | | Di-sec-octyl phthalate; bis(2 ethylhexyl) phthalate | -- | 5 | | --
• Di-sec octyl phthalate (Di-(2-ethylhexyl) phthalate)Di-sec octyl phthalate (Di-(2-ethylhexyl) phthalate) | 117-81-7 | - | 5 | - |
• Diacetone alcoholNIOSH REL TWA 50 ppm (240 mg/m3)
• Diazinon®NIOSH REL TWA 0.1 mg/m3 [skin]
• DiazomethaneDiazomethane | 334-88-3 | 0.2 | 0.4 | - |
• Dibenzoyl peroxide; see Benzoyl peroxide94360 | | Dibenzoyl peroxide; see Benzoyl peroxide
• DiboraneDiborane | 19287-45-7 | 0.1 | 0.1 | - |
• Dibromodifluoromethane; see Difluorodibromomethane75616 | | Dibromodifluoromethane; see Difluorodibromomethane
• Dibutyl phenyl phosphate2528361 | S | Dibutyl phenyl phosphate | 0.3 | 3.5
• Dibutyl phosphateDibutyl phosphate | 107-66-4 | 1 | 5 | - |
• Dibutyl phthalateDibutyl phthalate | 84-74-2 | - | 5 | - |
• Dichloroacetylene7572294 | | Dichloroacetylene | 0.1 | 0.4 | C
• DichlorodifluoromethaneDichlorodifluoromethane | 75-71-8 | 1000 | 4950 | - |
• Dichlorodiphenyltrichloroethane (DDT)Dichlorodiphenyltrichloroethane (DDT) | 50-29-3 | - | 1 | X |
• Dichloroethyl etherDichloroethyl ether | 111-44-4 | (C)15 | (C)90 | X |
• Dichlorofluoromethane; Fluorocarbon 2175434 | | Dichlorofluoromethane; Fluorocarbon 21 | 10 | 42
• Dichloromethane; see Methylene chloride75092 | | Dichloromethane; see Methylene chloride
• DichloromonofluoromethaneDichloromonofluoromethane | 75-43-4 | 1000 | 4200 | - |
• DichlorvosNIOSH REL TWA 1 mg/m3 [skin]
• Dichlorvos (DDVP)Dichlorvos (DDVP) | 62-73-7 | - | 1 | X |
• Dichlorvos (DDVP); 2,2-dichlorovinyl dimethyl phosphate62737 | S | Dichlorvos (DDVP); 2,2-dichlorovinyl dimethyl phosphate | 0.1 | 1
• Dicrotophos141662 | S | Dicrotophos | -- | 0.25
• Dicyclohexylmethane-4,4'-diisocyanate; see Methylene bis-(4-cyclohexylisocyanate)5124301 | | Dicyclohexylmethane-4,4'-diisocyanate; see Methylene bis-(4-cyclohexylisocyanate)
• Dicyclopentadiene77736 | | Dicyclopentadiene | 5 | 30
• Dicyclopentadienyl ironDicyclopentadienyl iron | 102-54-5 | - | - | - |
• DieldrinDieldrin | 60-57-1 | - | 0.25 | X |
• Diethanolamine111422 | S | Diethanolamine | 0.46 | 2
• Diethyl ether; see Ethyl ether60297 | | Diethyl ether; see Ethyl ether
• Diethyl ketone96220 | | Diethyl ketone | 200 | 705 | | 300 | 1057
• Diethyl phthalate84662 | | Diethyl phthalate | -- | 5
• DiethylamineDiethylamine | 109-89-7 | 25 | 75 | - |
• Diethylene glycol diethyl ether, Ethyl diglyme112367 | S | Diethylene glycol diethyl ether, Ethyl diglyme | 5 | 33
• Diethylene glycol dimethyl ether, Diglyme111966 | S | Diethylene glycol dimethyl ether, Diglyme | 1 | 5.5 | | 5 | 27
• DiethylenetriamineNIOSH REL TWA 1 ppm (4 mg/m3) [skin]
• DifluorodibromomethaneDifluorodibromomethane | 75-61-6 | 100 | 860 | - |
• Difluorodibromomethane; dibromodifluoromethane75616 | | Difluorodibromomethane; dibromodifluoromethane | 100 | 860
• Diglycidyl etherNIOSH REL Ca TWA 0.1 ppm (0.5 mg/m3)
• Diisobutyl ketoneDiisobutyl ketone | 108-83-8 | 50 | 290 | - |
• Diisobutyl ketone; 2,6-dimethyl-4-heptanone108838 | | Diisobutyl ketone; 2,6-dimethyl-4-heptanone | 25 | 150
• Diisopropyl ether; see Isopryl ether108203 | | Diisopropyl ether; see Isopryl ether
• DiisopropylamineDiisopropylamine | 108-18-9 | 5 | 20 | X |
• Dimethoxymethane; see Methylal109875 | | Dimethoxymethane; see Methylal
• Dimethyl-1,2-dibromo-2,2-dichlorethyl phosphateNIOSH REL TWA 3 mg/m3 [skin]
• Dimethyl-1,2-dibromo-2,2-dichloroethyl phosphateDimethyl-1,2-dibromo-2,2-dichloroethyl phosphate | 300-76-5 | - | 3 | - |
• Dimethyl acetamideDimethyl acetamide | 127-19-5 | 10 | 35 | X |
• Dimethyl carbamoyl chlorideNIOSH REL Ca See Appendix A
• Dimethyl ketone; see Acetone67641 | | Dimethyl ketone; see Acetone
• Dimethyl phthalate131113 | | Dimethyl phthalate | -- | 5
• Dimethyl sulfateDimethyl sulfate | 77-78-1 | 1 | 5 | X |
• Dimethyl sulfate; methyl sulfate77781 | S | Dimethyl sulfate; methyl sulfate | 0.1 | 0.5
• DimethylamineDimethylamine | 124-40-3 | 10 | 18 | - |
• Dimethylaminobenzene; see Xylidene1300738 | | Dimethylaminobenzene; see Xylidene
• DimethylaminopropionitrileNIOSH REL See Appendix C (NIAX® Catalyst ESN)
• Dimethylaniline (N,N-Dimethylaniline)Dimethylaniline (N,N-Dimethylaniline) | 121-69-7 | 5 | 25 | X |
• Dimethylbenzene; see Xylene1330207 | | Dimethylbenzene; see Xylene
• Dimethylethoxysilane14857342 | | Dimethylethoxysilane | 0.5 | 2.1 | | 1.5 | 6.4
• DimethylformamideDimethylformamide | 68-12-2 | 10 | 30 | X |
• Dimethylformamide; DMF68122 | S | Dimethylformamide; DMF | 10 | 30
• DinitolmideNIOSH REL TWA 5 mg/m3
• DioxaneNIOSH REL Ca C 1 ppm (3.6 mg/m3) [30-minute]
• Dioxane (Diethylene dioxide)Dioxane (Diethylene dioxide) | 123-91-1 | 100 | 360 | X |
• Dioxathion78342 | S | Dioxathion | -- | 0.2
• DiphenylNIOSH REL TWA 1 mg/m3 (0.2 ppm)
• Diphenyl (Biphenyl)Diphenyl (Biphenyl) | 92-52-4 | 0.2 | 1 | - |
• Diphenyl; see Biphenyl92524 | | Diphenyl; see Biphenyl
• DiphenylamineNIOSH REL TWA 10 mg/m3

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