Records 2,401–2,800 — Mailing and air-carriage restrictions by item category

Records 2,401 to 2,800 of 3,204. Each links to its own page, which carries the source URL and the quoted line that states the value.

• Nitroglycerin, desensitized with not less than 40 percent non-volatile water insoluble phlegmatizer, by massNitroglycerin, desensitized with not less than 40 percent non-volatile water insoluble phlegmatizer, by mass 1.1D UN0143 II Prohibited Prohibited
• Nitroglycerin, liquid, not desensitizedNitroglycerin, liquid, not desensitized Forbidden Prohibited Prohibited Prohibited Prohibited
• Nitroglycerin mixture, desensitized, liquid, flammable, n.o.s. with not more than 30 percent nitroglycerin, by massNitroglycerin mixture, desensitized, liquid, flammable, n.o.s. with not more than 30 percent nitroglycerin, by mass 3 UN3343 n/a Prohibited Prohibited
• Nitroglycerin mixture, desensitized, liquid, n.o.s. with not more than 30 percent nitroglycerin, by massNitroglycerin mixture, desensitized, liquid, n.o.s. with not more than 30 percent nitroglycerin, by mass 3 UN3357 II Prohibited Prohibited
• Nitroglycerin mixture, desensitized, solid, n.o.s. with more than 2 percent but not more than 10 percent nitroglycerin, by massNitroglycerin mixture, desensitized, solid, n.o.s. with more than 2 percent but not more than 10 percent nitroglycerin, by mass 4.1 UN3319 II Prohibited Prohibited
• Nitroglycerin, solution in alcohol, with more than 1 percent but not more than 5 percent nitroglycerinNitroglycerin, solution in alcohol, with more than 1 percent but not more than 5 percent nitroglycerin 3 UN3064 II Prohibited Prohibited
• Nitroglycerin, solution in alcohol, with more than 1 percent but not more than 10 percent nitroglycerinNitroglycerin, solution in alcohol, with more than 1 percent but not more than 10 percent nitroglycerin 1.1D UN0144 II Prohibited Prohibited
• Nitroglycerin, solution in alcohol, with not more than 1 percent nitroglycerinNitroglycerin, solution in alcohol, with not more than 1 percent nitroglycerin 3 UN1204 II Prohibited Prohibited
• Nitroguanidine nitrateNitroguanidine nitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• Nitroguanidine or Picrite, dry or wetted with less than 20 percent water, by massNitroguanidine or Picrite, dry or wetted with less than 20 percent water, by mass 1.1D UN0282 II Prohibited Prohibited
• Nitroguanidine, wetted or Picrite, wetted with not less than 20 percent water, by massNitroguanidine, wetted or Picrite, wetted with not less than 20 percent water, by mass 4.1 UN1336 I Prohibited Prohibited
• Nitrohydrochloric acidNitrohydrochloric acid 8 UN1798 I Prohibited Prohibited
• Nitromannite (dry)Nitromannite (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Nitromethane · USPSNitromethane 3 UN1261 II Prohibited 3A
• NitronaphthaleneNitronaphthalene 4.1 UN2538 III Prohibited 4A
• NitropropanesNitropropanes 3 UN2608 III Prohibited 3A
• Nitrostarch, dry or wetted with less than 20 percent water, by massNitrostarch, dry or wetted with less than 20 percent water, by mass 1.1D UN0146 II Prohibited Prohibited
• Nitrostarch, wetted with not less than 20 percent water, by massNitrostarch, wetted with not less than 20 percent water, by mass 4.1 UN1337 I Prohibited Prohibited
• Nitrosugars (dry)Nitrosugars (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Nitrosyl chlorideNitrosyl chloride 2.3 UN1069 n/a Prohibited Prohibited
• Nitrosylsulfuric acid, liquidNitrosylsulfuric acid, liquid 8 UN2308 II 8A 8A
• Nitrosylsulfuric acid, solidNitrosylsulfuric acid, solid 8 UN3456 II 8A 8A
• Nitrotoluenes, liquidNitrotoluenes, liquid 6.1 UN1664 II Prohibited Prohibited
• Nitrotoluenes, solidNitrotoluenes, solid 6.1 UN3446 II Prohibited Prohibited
• Nitrotoluidines (mono)Nitrotoluidines (mono) 6.1 UN2660 III 6A 6A
• Nitrotriazolone or NTONitrotriazolone or NTO 1.1D UN0490 II Prohibited Prohibited
• Nitrous oxideNitrous oxide 2.2 UN1070 n/a 2B 2B
• Nitrous oxide, refrigerated liquidNitrous oxide, refrigerated liquid 2.2 UN2201 n/a Prohibited Prohibited
• Nitroxylenes, liquidNitroxylenes, liquid 6.1 UN1665 II Prohibited Prohibited
• Nitroxylenes, solidNitroxylenes, solid 6.1 UN3447 II Prohibited Prohibited
• NonanesNonanes 3 UN1920 III Prohibited 3A
• nonhazardous liquidsLiquids that are nonhazardous (i.e., not regulated as hazardous materials) are mailable provided they are properly packaged as specified in 451.3
• nonnarcotic prescription medicinesOnly a pharmacists, medical practitioners, or other authorized dispensers may mail nonnarcotic prescription medications to patients under their care.
• nonprescription medicines (OTC drugs)Over-the-Counter (OTC) Drugs: Medicines that can be obtained without a prescription, such as patent medicines, aspirin, antiseptics, cold remedies, diet pills, and cosmetic medicin
• Nonspillable wet batteries (UN2800)Nonspillable Wet Batteries (UN2800): Acceptable if completely sealed to prevent the liquid corrosive from spilling during handling
• NonyltrichlorosilaneNonyltrichlorosilane 8 UN1799 II Prohibited Prohibited
• o-Dichlorobenzeneo-Dichlorobenzene 6.1 UN1591 III 6A 6A
• OctadecyltrichlorosilaneOctadecyltrichlorosilane 8 UN1800 II Prohibited Prohibited
• OctadieneOctadiene 3 UN2309 II Prohibited 3A
• Octafluorobut-2-ene or Refrigerant gas R 1318Octafluorobut-2-ene or Refrigerant gas R 1318 2.2 UN2422 n/a Prohibited Prohibited
• Octafluorocyclobutane, or Refrigerant gas RC 318Octafluorocyclobutane, or Refrigerant gas RC 318 2.2 UN1976 n/a Prohibited Prohibited
• Octafluoropropane or Refrigerant gas R 218Octafluoropropane or Refrigerant gas R 218 2.2 UN2424 n/a Prohibited Prohibited
• OctanesOctanes 3 UN1262 II Prohibited 3A
• Octolite or Octol, dry or wetted with less than 15 percent water, by mass · USPSOctolite or Octol, dry or wetted with less than 15 percent water, by mass 1.1D UN0266 II Prohibited Prohibited
• OctonalOctonal 1.1D UN0496 n/a Prohibited Prohibited
• Octyl aldehydesOctyl aldehydes 3 UN1191 III Prohibited 3A
• OctyltrichlorosilaneOctyltrichlorosilane 8 UN1801 II Prohibited Prohibited
• odor-producing materialsAny matter that is a source of an obnoxious odor is nonmailable.
• Oil gas, compressedOil gas, compressed 2.3 UN1071 n/a Prohibited Prohibited
• Organic peroxide, type A, liquid or solid · USPSOrganic peroxide, type A, liquid or solid Forbidden Prohibited Prohibited Prohibited Prohibited
• Organic peroxide type B, liquidOrganic peroxide type B, liquid 5.2 UN3101 II 5A 5A
• Organic peroxide type B, liquid, temperature controlledOrganic peroxide type B, liquid, temperature controlled 5.2 UN3111 II Prohibited Prohibited
• Organic peroxide type B, solidOrganic peroxide type B, solid 5.2 UN3102 II 5A 5A
• Organic peroxide type B, solid, temperature controlledOrganic peroxide type B, solid, temperature controlled 5.2 UN3112 II Prohibited Prohibited
• Organic peroxide type C, liquidOrganic peroxide type C, liquid 5.2 UN3103 II 5A 5A
• Organic peroxide type C, liquid, temperature controlledOrganic peroxide type C, liquid, temperature controlled 5.2 UN3113 II Prohibited Prohibited
• Organic peroxide type C, solidOrganic peroxide type C, solid 5.2 UN3104 II 5A 5A
• Organic peroxide type C, solid, temperature controlledOrganic peroxide type C, solid, temperature controlled 5.2 UN3114 II Prohibited Prohibited
• Organic peroxide type D, liquidOrganic peroxide type D, liquid 5.2 UN3105 II 5A 5A
• Organic peroxide type D, liquid, temperature controlledOrganic peroxide type D, liquid, temperature controlled 5.2 UN3115 II Prohibited Prohibited
• Organic peroxide type D, solidOrganic peroxide type D, solid 5.2 UN3106 II 5A 5A
• Organic peroxide type D, solid, temperature controlledOrganic peroxide type D, solid, temperature controlled 5.2 UN3116 II Prohibited Prohibited
• Organic peroxide type E, liquidOrganic peroxide type E, liquid 5.2 UN3107 II 5A 5A
• Organic peroxide type E, liquid, temperature controlledOrganic peroxide type E, liquid, temperature controlled 5.2 UN3117 II Prohibited Prohibited
• Organic peroxide type E, solidOrganic peroxide type E, solid 5.2 UN3108 II 5A 5A
• Organic peroxide type E, solid, temperature controlledOrganic peroxide type E, solid, temperature controlled 5.2 UN3118 II Prohibited Prohibited
• Organic peroxide type F, liquidOrganic peroxide type F, liquid 5.2 UN3109 II 5A 5A
• Organic peroxide type F, liquid, temperature controlledOrganic peroxide type F, liquid, temperature controlled 5.2 UN3119 II Prohibited Prohibited
• Organic peroxide type F, solidOrganic peroxide type F, solid 5.2 UN3110 II 5A 5A
• Organic peroxide type F, solid, temperature controlledOrganic peroxide type F, solid, temperature controlled 5.2 UN3120 II Prohibited Prohibited
• Organic peroxides (Division 5.2) not qualifying as Limited QuantityDivision 5.2, Organic Peroxides: Organic peroxides are nonmailable unless they qualify as Limited Quantity air or Limited Quantity surface.
• Organic phosphate, mixed with compressed gas or Organic phosphate compound, mixed with compressed gas or Organic phosphorous compound, mixed with compressed gasOrganic phosphate, mixed with compressed gas or Organic phosphate compound, mixed with compressed gas or Organic phosphorous compound, mixed with compressed gas 2.3 NA1955 n/a Proh
• Organic pigments, self-heatingOrganic pigments, self-heating 4.2 UN3313 II, III Prohibited Prohibited
• Organochlorine pesticides liquid, flammable, toxic, flashpoint less than 23° COrganochlorine pesticides liquid, flammable, toxic, flashpoint less than 23° C 3 UN2762 I, II Prohibited Prohibited
• Organometallic substance, liquid, pyro9phoric, water-reactiveOrganometallic substance, liquid, pyro9phoric, water-reactive 4.2 UN3394 I Prohibited Prohibited
• Organometallic substance, liquid, pyrophoricOrganometallic substance, liquid, pyrophoric 4.2 UN3392 I Prohibited Prohibited
• Organometallic substance, liquid, pyrophoric, water-reactiveOrganometallic substance, liquid, pyrophoric, water-reactive 4.3 UN3398 I, II, III Prohibited Prohibited
• Organometallic substance, liquid, pyrophoric, water-reactive, flammableOrganometallic substance, liquid, pyrophoric, water-reactive, flammable 4.3 UN3399 I, II, III Prohibited Prohibited
• Organometallic substance, solid, pyrophoricOrganometallic substance, solid, pyrophoric 4.2 UN3391 I Prohibited Prohibited
• Organometallic substance, solid, pyrophoric, water-reactiveOrganometallic substance, solid, pyrophoric, water-reactive 4.2 UN3393 I Prohibited Prohibited
• Organometallic substance, solid, self heatingOrganometallic substance, solid, self heating 4.2 UN3400 II, III Prohibited Prohibited
• Organometallic substance, solid, water-reactiveOrganometallic substance, solid, water-reactive 4.3 UN3395 I, II, III Prohibited Prohibited
• Organometallic substance, solid, water-reactive, flammableOrganometallic substance, solid, water-reactive, flammable 4.3 UN3396 I, II, III Prohibited Prohibited
• Organometallic substance, solid, water-reactive, self-heatingOrganometallic substance, solid, water-reactive, self-heating 4.3 UN3397 I, II, III Prohibited Prohibited
• Organophosphorus compound, toxic, flammable, n.o.s.Organophosphorus compound, toxic, flammable, n.o.s. 6.1 UN3279 I, II Prohibited Prohibited
• Organophosphorus pesticides, liquid, flammable, toxic, flashpoint less than 23° COrganophosphoruspesticides,liquid, flammable, toxic, flashpoint less than 23° C 3 UN2784 I, II Prohibited Prohibited
• Organophosphorus pesticides, liquid, toxic, flammable, flashpoint not less than 23° COrganophosphoruspesticides,liquid, toxic, flammable, flashpoint not less than 23° C 6.1 UN3017 I, II Prohibited Prohibited
• Organophosphoruspesticides,liquid, flammable, toxic, flashpoint less than 23° C · USPSOrganophosphoruspesticides,liquid, flammable, toxic, flashpoint less than 23° C 3 UN2784 I, II Prohibited Prohibited
• Organotin compounds, liquid, n.o.sOrganotin compounds, liquid, n.o.s 6.1 UN2788 III 6A 6A
• Organotin compounds, liquid, n.o.s. · USPSOrganotin compounds, liquid, n.o.s. 6.1 UN2788 I, II Prohibited Prohibited
• Organotin pesticides, liquid, flammable, toxic, flashpoint less than 23° COrganotin pesticides, liquid, flammable, toxic, flashpoint less than 23° C 3 UN2787 I, II Prohibited Prohibited
• Osmium tetroxide · USPSOsmium tetroxide 6.1 UN2471 I Prohibited Prohibited
• Other regulated substances, liquid, n.o.s.Other regulated substances, liquid, n.o.s. 9 NA3082 III 9C 9C
• Other regulated substances, solid, n.o.s.Other regulated substances, solid, n.o.s. 9 NA3077 III 9C 9C
• Oxidizing solid, flammable, n.o.s.Oxidizing solid, flammable, n.o.s. 5.1 UN3137 I Prohibited Prohibited
• Oxidizing solid, self-heating, n.o.s.Oxidizing solid, self-heating, n.o.s. 5.1 UN3100 II Prohibited Prohibited
• Oxidizing solid, water reactive, n.o.s.Oxidizing solid, water reactive, n.o.s. 5.1 UN3121 n/a Prohibited Prohibited
• Oxidizing substances and organic peroxides (Hazard Class 5) — international mailInternational Mail: All oxidizing substances and organic peroxides are prohibited.
• Oxidizing substances or organic peroxides qualifying as Limited QuantityDomestic Mail via Air or Surface Transportation: Oxidizing substances or organic peroxides that qualify as Limited Quantity air or Limited Quantity surface are permitted.
• Oxygen, compressedOxygen, compressed 2.2 UN1072 n/a 2B 2B
• Oxygen, Compressed (UN1072) — Division 2.2 nonflammable gasOxygen, Compressed (UN1072): Division 2.2 nonflammable gas. Compressed oxygen is mailable if it qualifies as a Limited Quantity material
• Oxygen difluoride, compressedOxygen difluoride, compressed 2.3 UN2190 n/a Prohibited Prohibited
• Oxygen generator, chemical (including when contained in associated equipment, e.g., passenger service units (PSUs), portable breathing equipment (PBE), etc.)Oxygen generator, chemical (including when contained in associated equipment, e.g., passenger service units (PSUs), portable breathing equipment (PBE), etc.) 5.1 UN3356 II Prohibit
• Oxygen generator, chemical, spentOxygen generator, chemical, spent 9 NA3356 III Prohibited Prohibited
• Oxygen, refrigerated liquid (cryogenic liquid)Oxygen,refrigeratedliquid (cryogenic liquid) 2.2 UN1073 n/a Prohibited Prohibited
• Oxygen, Refrigerated Liquid (UN1073)Oxygen, Refrigerated Liquid (UN1073): (Also known as liquid oxygen) is prohibited from mailing under any circumstances.
• Oxygen,refrigeratedliquid (cryogenic liquid) · USPSOxygen,refrigeratedliquid (cryogenic liquid) 2.2 UN1073 n/a Prohibited Prohibited
• p-Diazidobenzenep-Diazidobenzene Forbidden Prohibited Prohibited Prohibited Prohibited
• p-Nitrosodimethylanilinep-Nitrosodimethylaniline 4.2 UN1369 II Prohibited Prohibited
• p-Xylyl diazidep-Xylyl diazide Forbidden Prohibited Prohibited Prohibited Prohibited
• Packages with old hazmat markings or stickers (reused boxes)reused boxes with old markings — even if your item is harmless, a box with an old hazmat sticker will be flagged
• PaintFlammable or combustible paint and paint-related items are generally accepted for mailing, provided the material can qualify as a consumer commodity material or ORM-D (for surface
• Paint and related items (UN1263) — lacquer, varnish, shellac, etc.Paint and Related Items (UN1263): A flammable or combustible liquid, which includes items such as lacquer, paint-thinning or paint-drying compounds, shellac, varnish, liquid alumin
• Paint, corrosive,flammable (including paint, lacquer, enamel, stain, shellac, varnish, polish, liquid filler and liquid lacquer base) · USPSPaint, corrosive,flammable (including paint, lacquer, enamel, stain, shellac, varnish, polish, liquid filler and liquid lacquer base) 8 UN3470 II Prohibited 8A
• Paint including paint, lacquer, enamel, stain, shellac solutions, varnish, polish, liquid filler, and liquid lacquer basePaint including paint, lacquer, enamel, stain, shellac solutions, varnish, polish, liquid filler, and liquid lacquer base 3 UN1263 I, II, III Prohibited 3A
• Paint or Paint related materialPaint or Paint related material 8 UN3066 II, III 8A 8A
• Paint related material corrosive, flammable (including paint thinning or reducing compound)Paint related material corrosive, flammable (including paint thinning or reducing compound) 8 UN3470 II Prohibited 8A
• Paint related material, flammable, corrosive (including paint thinning or reducing compound)Paint related material, flammable, corrosive (includingpaint thinningor reducing compound) 3 UN3469 I, II Prohibited Prohibited
• Paint related material including paint thinning, drying, removing, or reducing compoundPaint related material including paint thinning, drying, removing, or reducing compound 3 UN1263 I, II, III Prohibited 8A
• Paint thinnerPaint thinner | Flammable liquid | UN1263
• Paper, unsaturated oil treated incompletely dried (including carbon paper)Paper, unsaturated oil treated incompletely dried (including carbon paper) 4.2 UN1379 III Prohibited Prohibited
• ParaformaldehydeParaformaldehyde 4.1 UN2213 III Prohibited 4A
• ParaldehydeParaldehyde 3 UN1264 III Prohibited 3A
• Parathion and compressed gas mixture · USPSParathion and compressed gas mixture 2.3 NA1967 n/a Prohibited Prohibited
• PentachloroethanePentachloroethane 6.1 UN1669 II Prohibited Prohibited
• PentachlorophenolPentachlorophenol 6.1 UN3155 II Prohibited Prohibited
• Pentaerythrite tetranitrate (dry) · USPSPentaerythrite tetranitrate (dry) Forbidden Prohibited Prohibited
• Pentaerythrite tetranitrate mixture, desensitized, solid, n.o.s. or Pentaerythritol tetranitrate mixture, desensitized, solid, n.o.s. or PETN mixture, desensitized, solid, n.o.s., with more than 10 percent but not more than 20 percent PETN, by massPentaerythrite tetranitrate mixture, desensitized, solid, n.o.s. or Pentaerythritol tetranitrate mixture, desensitized, solid, n.o.s. or PETN mixture, desensitized, solid, n.o.s.,
• Pentaerythrite tetranitrate or Pentaerythritol tetranitrate or PETN, with not less than 7 percent wax by massPentaerythrite tetranitrate or Pentaerythritol tetranitrate or PETN, with not less than 7 percent wax by mass 1.1D UN0411 II Prohibited Prohibited
• Pentafluoroethane or Refrigerant gas R 125 · USPSPentafluoroethane or Refrigerant gas R 125 2.2 UN3220 n/a 2B 2B
• PentamethylheptanePentamethylheptane 3 UN2286 III Prohibited 3A
• Pentane-2,4-dionePentane-2,4-dione 3 UN2310 III Prohibited 3A
• PentanesPentanes 3 UN1265 I, II Prohibited 3A
• Pentanitroaniline (dry)Pentanitroaniline (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• PentanolsPentanols 3 UN1105 II, III Prohibited 3A
• PentaporanePentaporane 4.2 UN1380 I Prohibited Prohibited
• Pentolite, dry or wetted with less than 15 percent water, by massPentolite, dry or wetted with less than 15 percent water, by mass 1.1D UN0151 II Prohibited Prohibited
• Perchlorates, inorganic, aqueous solution, n.o.s.Perchlorates, inorganic, aqueous solution, n.o.s. 5.1 UN3211 II, III 5A 5A
• Perchlorates, inorganic, n.o.s.Perchlorates, inorganic, n.o.s. 5.1 UN1481 II, III 5A 5A
• Perchloric acidPerchloric acid.
• Perchloric acid with more than 50 percent but not more than 72 percent acid, by massPerchloric acid with more than 50 percent but not more than 72 percent acid, by mass 5.1 UN1873 I Prohibited Prohibited
• Perchloric acid, with more than 72 percent acid by massPerchloric acid, with more than 72 percent acid by mass Forbidden Prohibited Prohibited Prohibited Prohibited
• Perchloric acid with not more than 50 percent acid by massPerchloric acid with not more than 50 percent acid by mass 8 UN1802 II Prohibited Prohibited
• Perchloromethyl mercaptanPerchloromethyl mercaptan 6.1 UN1670 I Prohibited Prohibited
• Perchloryl fluoridePerchloryl fluoride 2.3 UN3083 n/a Prohibited Prohibited
• Perfluoro (ethyl vinyl ether)Perfluoro (ethyl vinyl ether) 2.1 UN3154 n/a Prohibited 2A
• Perfluoro (methyl vinyl ether)Perfluoro (methyl vinyl ether) 2.1 UN3153 n/a Prohibited 2A
• Perfumeregulated contents (perfume, nail polish, aerosol sprays, electronics with lithium-ion batteries)
• Perfume / colognePerfume / cologne | Flammable liquid (alcohol) | UN1266
• Perfume containing alcoholPerfume containing alcohol may not be shipped internationally or mailed domestically using air transportation.
• Perfumery products with flammable solventsPerfumery products with flammable solvents 3 UN1266 II, III Prohibited 3A
• PerfumesPerfume containing alcohol may not be shipped internationally or mailed domestically using air transportation. Perfume containing alcohol, however, may be shipped within the United
• Perfumes and colognesEssential oils, nail polish (and nail polish remover), perfumes and colognes, hand sanitizer, inks, stains and varnishes, hairspray, and electronics with a lithium battery are amon
• Perishable ItemsPerishable items are materials that can deteriorate in the mail, such as live animals, food, and plants. Permissible perishable items are sent at the mailer’s own risk. These items
• Permanganates, inorganic, aqueous solution, n.o.s.Permanganates, inorganic, aqueous solution, n.o.s. 5.1 UN3214 II 5A 5A
• Permanganates, inorganic, n.o.s.Permanganates, inorganic, n.o.s. 5.1 UN1482 II, III 5A 5A
• Peroxyacetic acid, with more than 43 percent and with more than 6 percent hydrogen peroxidePeroxyacetic acid, with more than 43 percent and with more than 6 percent hydrogen peroxide Forbidden Prohibited Prohibited Prohibited Prohibited
• Persulfates, inorganic, aqueous solution, n.o.s.Persulfates, inorganic, aqueous solution, n.o.s. 5.1 UN3216 III 5A 5A
• Persulfates, inorganic, n.o.s.Persulfates, inorganic, n.o.s. 5.1 UN3215 III 5A 5A
• Pesticides, insecticides, herbicides with oral LD50 greater than 300 mg/kg (nonregulated)Liquids and solids such as pesticides, insecticides, herbicides, and irritating material ( 346.11 (b)), that do not meet the classification criteria of a hazardous material per 49
• Pesticides, liquid, flammable, toxic, flashpoint less than 23° CPesticides, liquid, flammable, toxic, flashpoint less than 23° C 3 UN3021 I, II Prohibited Prohibited
• Petroleum distillates, n.o.s. or Petroleum products, n.o.s.Petroleum distillates, n.o.s. or Petroleum products, n.o.s. 3 UN1268 I, II, III Prohibited 3A
• Petroleum gases, liquified or Liquified petroleum gasPetroleum gases, liquified or Liquified petroleum gas 2.1 UN1075 n/a Prohibited 2A
• Petroleum sour crude oil, flammable, toxicPetroleum sour crude oil, flammable, toxic 3 UN3494 I, II, III Prohibited Prohibited
• Phenacyl bromidePhenacyl bromide 6.1 UN2645 II Prohibited Prohibited
• PhenetidinesPhenetidines 6.1 UN2311 III 6A 6A
• Phenol, moltenPhenol, molten 6.1 UN2312 II Prohibited Prohibited
• Phenol, solidPhenol, solid 6.1 UN1671 II Prohibited Prohibited
• Phenolsulfonic acid, liquidPhenolsulfonic acid, liquid 8 UN1803 II 8A 8A
• Phenoxyacetic acid derivative pesticide, liquid, flammable, toxic flashpoint less than 23° CPhenoxyacetic acid derivative pesticide, liquid, flammable, toxic flashpoint less than 23° C 3 UN3346 I, II Prohibited Prohibited
• Phenyl chloroformatePhenyl chloroformate 6.1 UN2746 II Prohibited Prohibited
• Phenyl isocyanatePhenyl isocyanate 6.1 UN2487 I Prohibited Prohibited
• Phenyl mercaptanPhenyl mercaptan 6.1 UN2337 I Prohibited Prohibited
• Phenyl phosphorus dichloridePhenyl phosphorus dichloride 8 UN2798 II 8A 8A
• Phenyl phosphorus thiodichloridePhenyl phosphorus thiodichloride 8 UN2799 II 8A 8A
• Phenylacetonitrile, liquidPhenylacetonitrile, liquid 6.1 UN2470 III 6A 6A
• Phenylacetyl chloridePhenylacetyl chloride 8 UN2577 II 8A 8A
• Phenylcarbylamine chloridePhenylcarbylamine chloride 6.1 UN1672 I Prohibited Prohibited
• Phenylenediamines (o-; m-; p-;)Phenylenediamines (o-; m-; p-;) 6.1 UN1673 III 6A 6A
• PhenylhydrazinePhenylhydrazine 6.1 UN2572 II Prohibited Prohibited
• Phenylmercuric acetatePhenylmercuric acetate 6.1 UN1674 II Prohibited Prohibited
• Phenylmercuric hydroxidePhenylmercuric hydroxide 6.1 UN1894 II Prohibited Prohibited
• Phenylmercuric nitratePhenylmercuric nitrate 6.1 UN1895 II Prohibited Prohibited
• PhenyltrichlorosilanePhenyltrichlorosilane 8 UN1804 II Prohibited Prohibited
• PhosgenePhosgene 2.3 UN1076 Prohibited Prohibited
• PhosphinePhosphine 2.3 UN2199 Prohibited Prohibited
• Phosphoric acid, solidPhosphoric acid, solid 8 UN3453 III 8A 8A
• Phosphoric acid solutionPhosphoric acid solution 8 UN1805 III 8A 8A
• Phosphorous acidPhosphorous acid 8 UN2834 III 8A 8A
• Phosphorus, amorphousPhosphorus, amorphous 4.1 UN1338 III Prohibited Prohibited
• Phosphorus heptasulfide, free from yellow or white phosphorusPhosphorus heptasulfide, free from yellow or white phosphorus 4.1 UN1339 II Prohibited Prohibited
• Phosphorus oxybromidePhosphorus oxybromide 8 UN1939 II Prohibited Prohibited
• Phosphorus oxybromide, moltenPhosphorus oxybromide, molten 8 UN2576 II Prohibited Prohibited
• Phosphorus oxychloridePhosphorus oxychloride 8 UN1810 II Prohibited Prohibited
• Phosphorus pentabromidePhosphorus pentabromide 8 UN2691 II 8A 8A
• Phosphorus pentachloridePhosphorus pentachloride 8 UN1806 II Prohibited Prohibited
• Phosphorus pentafluoridePhosphorus pentafluoride 2.3 UN2198 Prohibited Prohibited
• Phosphorus pentasulfide, free from yellow or white phosphorusPhosphorus pentasulfide, free from yellow or white phosphorus 4.3 UN1340 II Prohibited 4A
• Phosphorus pentoxidePhosphorus pentoxide 8 UN1807 II 8A 8A
• Phosphorus sesquisulfide, free from yellow or white phosphorusPhosphorus sesquisulfide, free from yellow or white phosphorus 4.1 UN1341 II Prohibited Prohibited
• Phosphorus tribromidePhosphorus tribromide 8 UN1808 II Prohibited Prohibited
• Phosphorus trichloridePhosphorus trichloride 6.1 UN1809 I Prohibited Prohibited
• Phosphorus trioxidePhosphorus trioxide 8 UN2578 III 8A 8A
• Phosphorus trisulfide, free from yellow or white phosphorusPhosphorus trisulfide, free from yellow or white phosphorus 4.1 UN1343 II Prohibited Prohibited
• Phosphorus, white dry or Phosphorus, white, under water or Phosphorus white, in solution or Phosphorus, yellow dry or Phosphorus, yellow, under water or Phosphorus, yellow, in solutionPhosphorus, white dry or Phosphorus, white, under water or Phosphorus white, in solution or Phosphorus, yellow dry or Phosphorus, yellow, under water or Phosphorus, yellow, in solu
• Phosphorus white, moltenPhosphorus white, molten 4.2 UN2447 I Prohibited Prohibited
• Phosphorus (white or red) and a chlorate, mixtures ofPhosphorus (white or red) and a chlorate, mixtures of Forbidden Prohibited Prohibited Prohibited Prohibited
• Photographic mixtures — corrosive liquid solutionsPhotographic Mixtures: Acceptable if the corrosive liquid solutions for preparing photographic processing mixtures can qualify as a Limited Quantity air or Limited Quantity surface
• Phthalic anhydride with more than .05 percent maleic anhydridePhthalic anhydride with more than .05 percent maleic anhydride 8 UN2214 III 8A 8A
• PicolinesPicolines 3 UN2313 III Prohibited 3A
• Pine oilPine oil 3 UN1272 III Prohibited 3A
• PiperazinePiperazine 8 UN2579 III 8A 8A
• PiperidinePiperidine 8 UN2401 I Prohibited Prohibited
• Plastic molding compound in dough, sheet, or extruded rope form evolving flammable vaporPlastic molding compound in dough, sheet, or extruded rope form evolving flammable vapor 9 UN3314 III Prohibited 9C
• Plastics, nitrocellulose-based, self- heating, n.o.s.Plastics, nitrocellulose-based, self- heating, n.o.s. 4.2 UN2006 III Prohibited Prohibited
• Poisonous drugs and medicinesPoisonous Drugs and Medicines: Poisonous drugs and medicines may be sent only from manufacturers or dealers to licensed professionals, including physicians, surgeons, dentists, pha
• PoisonsSome poisons may be sent by air and ground transport, others only by ground.
• Polychlorinated biphenyls, liquidPolychlorinated biphenyls, liquid 9 UN2315 II Prohibited 9C
• Polychlorinated biphenyls, solidPolychlorinated biphenyls, solid 9 UN3432 II Prohibited 9C
• Polyester resin kitPolyester resin kit 3 UN3269 n/a Prohibited 3A
• Polyhalogenated biphenyls, liquid or Polyhalogenated terphenyls, liquidPolyhalogenated biphenyls, liquid or Polyhalogenated terphenyls, liquid 9 UN3151 II Prohibited 9C
• Polyhalogenated biphenyls, solid or Polyhalogenated terphenyls, solidPolyhalogenated biphenyls, solid or Polyhalogenated terphenyls, solid 9 UN3152 II Prohibited 9C
• Polymeric beads, expandable, evolving flammable vaporPolymeric beads, expandable, evolving flammable vapor 9 UN2211 III Prohibited 9C
• Pool shock / chlorine tabsPool shock / chlorine tabs | Oxidizer | UN1748
• Portable chargers / power banksPortable chargers / power banks | Lithium battery (standalone) | UN3480
• PotassiumPotassium 4.3 UN2257 I Prohibited Prohibited
• Potassium arsenatePotassium arsenate 6.1 UN1677 II Prohibited Prohibited
• Potassium arsenitePotassium arsenite 6.1 UN1678 II Prohibited Prohibited
• Potassium borohydridePotassium borohydride 4.3 UN1870 I Prohibited Prohibited
• Potassium bromatePotassium bromate 5.1 UN1484 II 5A 5A
• Potassium carbonylPotassium carbonyl Forbidden Prohibited Prohibited Prohibited Prohibited
• Potassium chloratePotassium chlorate 5.1 UN1485 II 5A 5A
• Potassium chlorate, aqueous solutionPotassium chlorate, aqueous solution 5.1 UN2427 II, III 5A 5A
• Potassium cuprocyanidePotassium cuprocyanide 6.1 UN1679 II Prohibited Prohibited
• Potassium cyanide, solidPotassium cyanide, solid 6.1 UN1680 I Prohibited Prohibited
• Potassium cyanide solutionPotassium cyanide solution 6.1 UN3413 I Prohibited Prohibited
• Potassium dithionite or Potassium hydrosulfite · USPSPotassium dithionite or Potassium hydrosulfite 4.2 UN1929 II Prohibited Prohibited
• Potassium fluoride, solidPotassium fluoride, solid 6.1 UN1812 III 6A 6A
• Potassium fluoride solutionPotassium fluoride solution 6.1 UN3422 III 6A 6A
• Potassium fluoroacetatePotassium fluoroacetate 6.1 UN2628 I Prohibited Prohibited
• Potassium fluorosilicatePotassium fluorosilicate 6.1 UN2655 III 6A 6A
• Potassium hydrogen sulfatePotassium hydrogen sulfate 8 UN2509 II 8A 8A
• Potassium hydrogendifluoride, solidPotassium hydrogendifluoride, solid 8 UN1811 II 8A 8A
• Potassium hydrogendifluoride, solutionPotassium hydrogendifluoride, solution 8 UN3421 II 8A 8A
• Potassium hydroxide, solidPotassium hydroxide, solid 8 UN1813 II 8A 8A
• Potassium hydroxide, solutionPotassium hydroxide, solution 8 UN1814 II, III 8A 8A
• Potassium, metal alloys, liquidPotassium, metal alloys, liquid 4.3 UN1420 I Prohibited 4A
• Potassium, metal alloys, solidPotassium, metal alloys, solid 4.3 UN3403 I Prohibited Prohibited
• Potassium metavanadatePotassium metavanadate 6.1 UN2864 II Prohibited Prohibited
• Potassium monoxidePotassium monoxide 8 UN2033 II 8A 8A
• Potassium nitratePotassium nitrate 5.1 UN1486 III 5A 5A
• Potassium nitrate and sodium nitrite mixturesPotassium nitrate and sodium nitrite mixtures 5.1 UN1487 II 5A 5A
• Potassium nitritePotassium nitrite 5.1 UN1488 II 5A 5A
• Potassium perchloratePotassium perchlorate 5.1 UN1489 II 5A 5A
• Potassium permanganatePotassium permanganate 5.1 UN1490 II 5A 5A
• Potassium peroxidePotassium peroxide.
• Potassium persulfatePotassium persulfate 5.1 UN1492 III 5A 5A
• Potassium phosphidePotassium phosphide 4.3 UN2012 I Prohibited Prohibited
• Potassium sodium alloys, liquidPotassium sodium alloys, liquid 4.3 UN1422 I Prohibited Prohibited
• Potassium sodium alloys, solidPotassium sodium alloys, solid 4.3 UN3404 I Prohibited Prohibited
• Potassium sulfide, anhydrous or Potassium sulfide with less than 30 percent water of crystallizationPotassium sulfide, anhydrous or Potassium sulfide with less than 30 percent water of crystallization 4.2 UN1382 II Prohibited Prohibited
• Potassium sulfide, hydrated with not less than 30 percent water of crystallizationPotassium sulfide, hydrated with not less than 30 percent water of crystallization 8 UN1847 II Prohibited Prohibited
• Potassium superoxidePotassium superoxide 5.1 UN2466 I Prohibited Prohibited
• Powder cake, wetted or Powder paste, wetted with not less than 17 percent alcohol by massPowder cake, wetted or Powder paste, wetted with not less than 17 percent alcohol by mass 1.1C UN0433 II Prohibited Prohibited
• Powder cake, wetted or Powder paste, wetted with not less than 25 percent water, by massPowder cake, wetted or Powder paste, wetted with not less than 25 percent water, by mass 1.3C UN0159 II Prohibited Prohibited
• Powder, smokelessPowder, smokeless 1.3C UN0161 II Prohibited Prohibited
• powders - dry materials that could cause damagePowders must be packed in sift-proof containers or other containers that are sealed in durable sift-proof outer containers.
• prescription medications containing controlled substancesPrescription medicines containing mailable narcotic drugs (controlled substances), when mailed by drug manufacturers or their registered agents, pharmacies, medical practitioners,
• Primers, cap typePrimers, cap type 1.1B UN0377 II Prohibited Prohibited
• Primers, tubularPrimers, tubular 1.3G UN0319 II Prohibited Prohibited
• Printing ink, flammable or Printing ink related material (including printing ink thinning or reducing compound), flammablePrinting ink, flammable or Printing ink related material (including printing ink thinning or reducing compound), flammable 3 UN1210 I, II, II Prohibited 3A
• Prohibited Prohibited Prohibited Prohibited Prohibited Nickel carbonylProhibited Prohibited Prohibited Prohibited Prohibited Nickel carbonyl 6.1 UN1259 I Prohibited Prohibited
• Projectiles, inert with tracerProjectiles, inert with tracer 1.4G UN0425 II Prohibited Prohibited
• Projectiles, with burster or expelling chargeProjectiles, with burster or expelling charge 1.2D UN0346 II Prohibited Prohibited
• Projectiles, with bursting chargeProjectiles, with bursting charge 1.1D UN0168 II Prohibited Prohibited
• Propadiene, stabilizedPropadiene, stabilized 2.1 UN2200 n/a Prohibited Prohibited
• Propane — Division 2.1 flammable gasPropane: Division 2.1 flammable gas. Propane is mailable via surface transportation as a Limited Quantity material only. Air transportation is prohibited.
• Propane see also Petroleum gases, liquified · USPSPropane see also Petroleum gases, liquified 2.1 UN1978 n/a Prohibited 2A
• PropanethiolsPropanethiols 3 UN2402 II Prohibited 3A
• Propellant, liquidPropellant, liquid 1.1C UN0497 II Prohibited Prohibited
• Propellant, solidPropellant, solid 1.1C UN0498 II Prohibited Prohibited
• Properly declared hazardous packages (USPS HazMat Handling Fee)A companion fee — the HazMat Handling Fee — also applies to properly declared hazardous packages: $7.50 each on Priority Mail Express and Priority Mail, and $0 initially on USPS Gr
• PropionaldehydePropionaldehyde 3 UN1275 II Prohibited 3A
• Propionic acid with not less than 10 percent and less than 90 percent acid by massPropionic acid with not less than 10 percent and less than 90 percent acid by mass 8 UN1848 III 8A 8A
• Propionic acid with not less than 90 percent acid by massPropionic acid with not less than 90 percent acid by mass 8 UN3463 II Prohibited 8A
• Propionic anhydridePropionic anhydride 8 UN2496 III 8A 8A
• PropionitrilePropionitrile 3 UN2404 II Prohibited Prohibited
• Propionyl chloridePropionyl chloride 3 UN1815 II Prohibited Prohibited
• Propyl formatesPropyl formates 3 UN1281 II Prohibited 3A
• PropylaminePropylamine 3 UN1277 II Prohibited Prohibited
• Propylene chlorohydrinPropylene chlorohydrin 6.1 UN2611 II Prohibited Prohibited
• Propylene oxidePropylene oxide 3 UN1280 I Prohibited Prohibited
• Propylene see also Petroleum gases, liquified · USPSPropylene see also Petroleum gases, liquified 2.1 UN1077 n/a Prohibited 2A
• Propylene tetramerPropylene tetramer 3 UN2850 III Prohibited 3A
• Propyleneimine, stabilizedPropyleneimine, stabilized 3 UN1921 I Prohibited Prohibited
• PropyltrichlorosilanePropyltrichlorosilane 8 UN1816 II Prohibited Prohibited
• PyridinePyridine 3 UN1282 II Prohibited Prohibited
• Pyridine perchloratePyridine perchlorate Forbidden Prohibited Prohibited Prohibited Prohibited
• Pyrophoric liquid, inorganic, n.o.s.Pyrophoric liquid, inorganic, n.o.s. 4.2 UN3194 I Prohibited Prohibited
• Pyrophoric liquids, organic, n.o.s.Pyrophoric liquids, organic, n.o.s. 4.2 UN2845 I Prohibited Prohibited
• Pyrophoric metals, n.o.s. or Pyrophoric alloys, n.o.s.Pyrophoric metals, n.o.s. or Pyrophoric alloys, n.o.s. 4.2 UN1383 I Prohibited Prohibited
• Pyrophoric solid, inorganic, n.o.s.Pyrophoric solid, inorganic, n.o.s. 4.2 UN3200 I Prohibited Prohibited
• Pyrophoric solids, organic, n.o.s.Pyrophoric solids, organic, n.o.s. 4.2 UN2846 I Prohibited Prohibited
• Pyrosulfuryl chloridePyrosulfuryl chloride 8 UN1817 II 8A 8A
• PyrrolidinePyrrolidine 3 UN1922 II Prohibited Prohibited
• Quebrachitol pentanitrateQuebrachitol pentanitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• queen honeybeesQueen Honeybees: May be shipped via air or surface transportation. Each mailpiece shipped via air transportation is limited to one queen and eight or less attendant honeybees.
• QuinolineQuinoline 6.1 UN2656 III 6A 6A
• Radioactive instruments and articles (UN2911) — clocks, electronic tubesUN2911: Low-risk items like clocks, electronic tubes, or similar devices with radioactive materials in gas or solid form, classified as "excepted package" for simplified handling u
• Radioactive material, excepted package-articles manufactured from natural uranium or depleted uranium or natural thorium · USPSRadioactive material, excepted package-articles manufactured from natural uranium or depleted uranium or natural thorium 7 UN2909 n/a Prohibited 7A
• Radioactive material, excepted package-empty packagingRadioactive material, excepted package-empty packaging 7 UN2908 n/a Prohibited Prohibited
• Radioactive material, excepted package-instruments or articlesRadioactive material, excepted package-instruments or articles 7 UN2911 n/a Prohibited 7A
• Radioactive material, excepted package-limited quantity of materialRadioactive material, excepted package-limited quantity of material 7 UN2910 n/a Prohibited 7A
• Radioactive material, low specific activity (LSA-I), non fissile or fissile- excepted.Radioactive material, low specific activity (LSA-I), non fissile or fissile- excepted. 7 UN2912 n/a Prohibited Prohibited
• Radioactive material, low specific activity (LSA-II), non fissile or fissile- excepted.Radioactive material, low specific activity (LSA-II), non fissile or fissile- excepted. 7 UN3321 n/a Prohibited Prohibited
• Radioactive material, low specific activity (LSA-III), non fissile or fissile- excepted.Radioactive material, low specific activity (LSA-III), non fissile or fissile- excepted. 7 UN3322 n/a Prohibited Prohibited
• Radioactive material, surface contaminated objects (SCO-I or SCO-II) non fissile or fissile- exceptedRadioactive material, surface contaminated objects (SCO-I or SCO-II) non fissile or fissile- excepted 7 UN2913 n/a Prohibited Prohibited
• Radioactive material, transported under special arrangement, fissileRadioactive material, transported under special arrangement, fissile 7 UN3331 n/a Prohibited Prohibited
• Radioactive material, transported under special arrangement, non fissile or fissile exceptedRadioactive material, transported under special arrangement, non fissile or fissile excepted 7 UN2919 n/a Prohibited Prohibited
• Radioactive material, Type A package, fissile non-special formRadioactive material, Type A package, fissile non-special form 7 UN3327 n/a Prohibited Prohibited
• Radioactive material, Type A package, fissile non-special form, non fissile or fissile-exceptedRadioactive material, Type A package, fissile non-special form, non fissile or fissile-excepted 7 UN2915 n/a Prohibited Prohibited
• Radioactive material, Type A package, non fissile or fissile- exceptedRadioactive material, Type A package, non fissile or fissile- excepted 7 UN3332 n/a Prohibited Prohibited
• Radioactive material, Type A package, special form, fissileRadioactive material, Type A package, special form, fissile 7 UN3333 n/a Prohibited Prohibited
• Radioactive material, Type B(M) package, fissileRadioactive material, Type B(M) package, fissile 7 UN3329 n/a Prohibited Prohibited
• Radioactive material, Type B(M) package non fissile or fissile- exceptedRadioactive material, Type B(M) package non fissile or fissile- excepted 7 UN2917 n/a Prohibited Prohibited
• Radioactive material, Type B(U) package, fissileRadioactive material, Type B(U) package, fissile 7 UN3328 n/a Prohibited Prohibited
• Radioactive material, Type B(U) package non fissile or fissile- exceptedRadioactive material, Type B(U) package non fissile or fissile- excepted 7 UN2916 n/a Prohibited Prohibited
• Radioactive material, uranium hexafluoride fissileRadioactive material, uranium hexafluoride fissile 7 UN2977 n/a Prohibited Prohibited
• Radioactive material, uranium hexafluoride non fissile or fissile- exceptedRadioactive material, uranium hexafluoride non fissile or fissile- excepted 7 UN2978 n/a Prohibited Prohibited
• Radioactive materials bearing Class 7 labels — international mailInternational Mail: Radioactive materials bearing or required to bear a Class 7 Radioactive White-I, Radioactive Yellow-II, or Radioactive Yellow-III hazardous materials warning la
• Radioactive materials bearing Class 7 labels or Fissile label — domestic surfaceDomestic Mail via Surface Transportation: Radioactive materials bearing or required to bear a Class 7 Radioactive White-I, Radioactive Yellow-II, Radioactive Yellow-III hazardous m
• Radioactive materials (Hazard Class 7) — domestic airDomestic Mail via Air Transportation: All radioactive materials are prohibited.
• Rags, oilyRags, oily 4.2 UN1856 III Prohibited Prohibited
• Receptacles, small, containing gas (gas cartridges) flammable, without release device, not refillable and not exceeding 1 L capacity · USPSReceptacles, small, containing gas (gas cartridges) flammable, without release device, not refillable and not exceeding 1 L capacity 2.1 UN2037 n/a Prohibited 2A
• Receptacles, small, containing gas or gas cartridges (nonflammable) without release device, not refillable and not exceeding 1 L capacityReceptacles, small, containing gas or gas cartridges (nonflammable) without release device, not refillable and not exceeding 1 L capacity 2.2 UN2037 n/a 2B 2B
• Receptacles, small, containing gas or gas cartridges (oxidizing) without release device, not refillable and not exceeding 1 L capacityReceptacles, small, containing gas or gas cartridges (oxidizing) without release device, not refillable and not exceeding 1 L capacity 2.2 UN2037 n/a Prohibited 2B
• Refrigerant gas R 404ARefrigerant gas R 404A 2.2 UN3337 n/a 2B 2B
• Refrigerant gas R 407ARefrigerant gas R 407A 2.2 UN3338 n/a 2B 2B
• Refrigerant gas R 407BRefrigerant gas R 407B 2.2 UN3339 n/a 2B 2B
• Refrigerant gas R 407CRefrigerant gas R 407C 2.2 UN3340 n/a 2B 2B
• Refrigerant gases, n.o.s.Refrigerant gases, n.o.s. 2.2 UN1078 n/a 2B 2B
• Refrigerant gases, n.o.s., or Dispersant gases, n.o.s.Refrigerant gases, n.o.s., or Dispersant gases, n.o.s. 2.1 NA1954 n/a Prohibited 2A
• Refrigerating machines, containing flammable, non-toxic, liquified gasRefrigerating machines, containing flammable, non-toxic, liquified gas 2.1 UN3358 n/a Prohibited 2A
• Refrigerating machines, containing non-flammable, non-toxic, or ammonia solution (UN2672)Refrigerating machines, containing non-flammable, non-toxic, or ammonia solution (UN2672) 2.2 UN2857 n/a 2B 2B
• Regulated magnetized materials — international mailInternational Mail: Only non-regulated magnetized materials with a magnetic field strength below 0.002 gauss at a distance of 7 feet may be mailed internationally. Regulated magnet
• Regulated medical waste (nonsharps), n.o.s. or Clinical waste, unspecified, n.o.s. or (BIO) Medical waste, n.o.s. or Biomedical waste, n.o.s. or Medical waste, n.o.s.Regulated medical waste (nonsharps), n.o.s. or Clinical waste, unspecified, n.o.s. or (BIO) Medical waste, n.o.s. or Biomedical waste, n.o.s. or Medical waste, n.o.s. 6.2 UN3291 II
• Regulated medical waste (sharps), n.o.s. or Clinical waste, unspecified, n.o.s. or (BIO) Medical waste, n.o.s. or Biomedical waste, n.o.s. or Medical waste, n.o.s.Regulated medical waste (sharps), n.o.s. or Clinical waste, unspecified, n.o.s. or (BIO) Medical waste, n.o.s. or Biomedical waste, n.o.s. or Medical waste, n.o.s. 6.2 UN3291 II Pr
• Release devices, explosiveRelease devices, explosive 1.4S UN0173 II Prohibited Prohibited
• Resin solution, flammableResin solution, flammable 3 UN1866 I, II, III Prohibited 3A
• ResorcinolResorcinol 6.1 UN2876 III 6A 6A
• rifles and shotguns - unloaded, intrastateunloaded rifles and shotguns are mailable. Mailers must comply with the rules and regulations per 27 CFR, Part 478, as well as state and local laws.
• Rivets, explosiveRivets, explosive 1.4S UN0174 II Prohibited Prohibited
• Rocket motorsRocket motors 1.1C UN0280 II Prohibited Prohibited
• Rocket motors, liquid fueledRocket motors, liquid fueled 1.2J UN0395 II Prohibited Prohibited
• Rocket motors with hypergolic liquids with or without an expelling chargeRocket motors with hypergolic liquids with or without an expelling charge 1.3L UN0250 II Prohibited Prohibited
• Rockets, line-throwingRockets, line-throwing 1.2G UN0238 II Prohibited Prohibited
• Rockets, liquid fueled with bursting chargeRockets, liquid fueled with bursting charge 1.1J UN0397 II Prohibited Prohibited
• Rockets, with bursting chargeRockets, with bursting charge 1.1E UN0181 II Prohibited Prohibited
• Rockets, with expelling chargeRockets, with expelling charge 1.2C UN0436 II Prohibited Prohibited
• Rockets, with inert headRockets, with inert head 1.3C UN0183 II Prohibited Prohibited
• Rosin oilRosin oil 3 UN1286 II, III Prohibited 3A
• Rubber scrap or shoddy, powdered or granulated, not exceeding 840 microns and rubber contend exceeding 45 percentRubber scrap or shoddy, powdered or granulated, not exceeding 840 microns and rubber contend exceeding 45 percent 4.1 UN1345 II Prohibited Prohibited
• Rubber solutionRubber solution 3 UN1287 II, III Prohibited 3A
• RubidiumRubidium 4.3 UN1423 I Prohibited Prohibited
• Rubidium hydroxideRubidium hydroxide 8 UN2678 II 8A 8A
• Rubidium hydroxide solutionRubidium hydroxide solution 8 UN2677 II, III 8A 8A
• Safety Fuses (UN0105, Division 1.4S)Safety Fuses (UN0105): Consists of a black powder core over-spun with yarns, waterproofing compounds, and/or tapes. Safety fuses identified as UN0105 and classified as Division 1.4
• Safety MatchesSafety matches must be sent via ground transportation and cannot be mailed internationally.
• Safety matches (book, card, or strike-on-box)Safety matches: Book, card, or strike-on-box safety matches are permitted only in domestic mail via surface transportation.
• secButyl chloroformatesecButyl chloroformate 6.1 NA2742 I Prohibited Prohibited
• Seed cake, containing vegetable oil solvent extractions and expelled seeds, with not more than 10 percent of oil and when the amount of moisture is higher than 11 percent, with not more than 20 percent of oil and moisture combinedSeed cake, containing vegetable oil solvent extractions and expelled seeds, with not more than 10 percent of oil and when the amount of moisture is higher than 11 percent, with not
• Seed cake with more than 1.5 percent oil and not more than 11 percent moistureSeed cake with more than 1.5 percent oil and not more than 11 percent moisture 4.2 UN1386 III Prohibited Prohibited
• Seed cake with not more than 1.5 percent oil and not more than 11 percent moistureSeed cake with not more than 1.5 percent oil and not more than 11 percent moisture 4.2 UN2217 III Prohibited Prohibited
• Selenates or SelenitesSelenates or Selenites 6.1 UN2630 I Prohibited Prohibited
• Selenic acidSelenic acid 8 UN1905 I Prohibited Prohibited
• Selenium disulfideSelenium disulfide 6.1 UN2657 II Prohibited Prohibited
• Selenium hexafluorideSelenium hexafluoride 2.3 UN2194 Prohibited Prohibited
• Selenium nitrideSelenium nitride Forbidden Prohibited Prohibited Prohibited Prohibited
• Selenium oxychlorideSelenium oxychloride 8 UN2879 I Prohibited Prohibited
• Self-defense spray, non-pressurized · USPSSelf-defense spray, non-pressurized 9 NA3334 III 9C 9C
• Self-heating liquid, corrosive, inorganic, n.o.s.Self-heating liquid, corrosive, inorganic, n.o.s. 4.2 UN3188 II, III Prohibited Prohibited
• Self-heating liquid, corrosive, organic, n.o.s.Self-heating liquid, corrosive, organic, n.o.s. 4.2 UN3185 II, III Prohibited Prohibited
• Self-heating liquid, inorganic, n.o.s.Self-heating liquid, inorganic, n.o.s. 4.2 UN3186 II, III Prohibited Prohibited
• Self-heating liquid, organic, n.o.s.Self-heating liquid, organic, n.o.s. 4.2 UN3183 II, III Prohibited Prohibited
• Self-heating liquid, toxic, inorganic, n.o.s.Self-heating liquid, toxic, inorganic, n.o.s. 4.2 UN3187 II, III Prohibited Prohibited
• Self-heating liquid, toxic, organic, n.o.s.Self-heating liquid, toxic, organic, n.o.s. 4.2 UN3184 II, III Prohibited Prohibited
• Self-heating solid, corrosive, inorganic, n.o.s.Self-heating solid, corrosive, inorganic, n.o.s. 4.2 UN3192 II, III Prohibited Prohibited
• Self-heating solid, corrosive, organic, n.o.s.Self-heating solid, corrosive, organic, n.o.s. 4.2 UN3126 II, III Prohibited Prohibited
• Self-heating solid, inorganic, n.o.s.Self-heating solid, inorganic, n.o.s. 4.2 UN3190 II, III Prohibited Prohibited
• Self-heating solid, organic, n.o.s.Self-heating solid, organic, n.o.s. 4.2 UN3088 II, III Prohibited Prohibited
• Self-heating solid, oxidizing, n.o.s.Self-heating solid, oxidizing, n.o.s. 4.2 UN3127 n/a Prohibited Prohibited
• Self-heating solid, toxic, inorganic, n.o.s.Self-heating solid, toxic, inorganic, n.o.s. 4.2 UN3191 II, III Prohibited Prohibited
• Self-heating solid, toxic, organic, n.o.s.Self-heating solid, toxic, organic, n.o.s. 4.2 UN3128 II, III Prohibited Prohibited
• Self-reactive liquid type B · USPSSelf-reactive liquid type B 4.1 UN3221 II Prohibited Prohibited
• Self-reactive liquid type B, temperature controlledSelf-reactive liquid type B, temperature controlled 4.1 UN3231 II Prohibited Prohibited
• Self-reactive liquid type CSelf-reactive liquid type C 4.1 UN3223 II Prohibited Prohibited
• Self-reactive liquid type C, temperature controlledSelf-reactive liquid type C, temperature controlled 4.1 UN3233 II Prohibited Prohibited
• Self-reactive liquid type DSelf-reactive liquid type D 4.1 UN3225 II Prohibited Prohibited
• Self-reactive liquid type D, temperature controlledSelf-reactive liquid type D, temperature controlled 4.1 UN3235 II Prohibited Prohibited
• Self-reactive liquid type ESelf-reactive liquid type E 4.1 UN3227 II Prohibited Prohibited

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