Records 801–1,200 — Mailing and air-carriage restrictions by item category

Records 801 to 1,200 of 3,204. Each links to its own page, which carries the source URL and the quoted line that states the value.

• 3,5-Dichloro-2,4,6-trifluoropyridine3,5-Dichloro-2,4,6-trifluoropyridine 6.1 NA9264 I Prohibited Prohibited
• 3,5-Dinitrosalicylic acid (lead salt) (dry)3,5-Dinitrosalicylic acid (lead salt) (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• 3-Azido-1,2-Propylene glycol dinitrate3-Azido-1,2-Propylene glycol dinitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• 3-Bromopropyne3-Bromopropyne 3 UN2345 II Prohibited 3A
• 3-Chloro-4-methylphenyl isocyanate, liquid3-Chloro-4-methylphenylisocyanate, liquid 6.1 UN2236 II Prohibited Prohibited
• 3-Chloro-4-methylphenyl isocyanate, solid3-Chloro-4-methylphenylisocyanate, solid 6.1 UN3428 II Prohibited Prohibited
• 3-Chloro-4-methylphenylisocyanate, liquid · USPS3-Chloro-4-methylphenylisocyanate, liquid 6.1 UN2236 II Prohibited Prohibited
• 3-Chloro-4-methylphenylisocyanate, solid · USPS3-Chloro-4-methylphenylisocyanate, solid 6.1 UN3428 II Prohibited Prohibited
• 3-Chloropropanol-13-Chloropropanol-1 6.1 UN2849 III 6A 6A
• 3-Diethylamino-propylamine3-Diethylamino-propylamine 3 UN2684 III Prohibited 3A
• 3-Methyl-1-butene3-Methyl-1-butene 3 UN2561 I Prohibited Prohibited
• 3-Methylbutan-2-one3-Methylbutan-2-one 3 UN2397 II Prohibited 3A
• 3-Nitro-4-chlorobenzotrifluoride3-Nitro-4-chlorobenzotrifluoride 6.1 UN2307 II Prohibited Prohibited
• 3-Trifluoromethylaniline3-Trifluoromethylaniline 6.1 UN2948 II Prohibited Prohibited
• 4,4’-Diaminodiphenyl methane4,4’-Diaminodiphenyl methane 6.1 UN2651 III 6A 6A
• 4,6-Dinitroresorcinol (heavy metal salts of) (dry)4,6-Dinitroresorcinol (heavy metal salts of) (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• 4-Bromo-1,2-dinitrobenzene4-Bromo-1,2-dinitrobenzene Forbidden Prohibited Prohibited Prohibited Prohibited
• 4-Bromo-1,2-dinitrobenzene (unstable at 59° C)4-Bromo-1,2-dinitrobenzene (unstable at 59° C) Forbidden Prohibited Prohibited Prohibited Prohibited
• 4-Chloro-o-toluidine hydrochloride, solid4-Chloro-o-toluidine hydrochloride, solid 6.1 UN1579 III 6A 6A
• 4-Chloro-o-toluidine hydrochloride, solution4-Chloro-o-toluidine hydrochloride, solution 6.1 UN3410 III 6A 6A
• 4-Methoxy-4-methylpentan-2-one4-Methoxy-4-methylpentan-2-one 3 UN2293 III Prohibited 3A
• 4-Methylmorpholine or n- methylmorpholine4-Methylmorpholine or n- methylmorpholine 3 UN2535 II Prohibited Prohibited
• 4-Nitrophenylhydrazine, with not less than 30 percent water, by mass4-Nitrophenylhydrazine, with not less than 30 percent water, by mass 4.1 UN3376 I Prohibited Prohibited
• 4-Thiapentanal4-Thiapentanal 6.1 UN2785 III 6A 6A
• 5-Azido-1-hydroxy tetrazole5-Azido-1-hydroxy tetrazole Forbidden Prohibited Prohibited Prohibited Prohibited
• 5-Mercaptotetrazol-1-acetic acid5-Mercaptotetrazol-1-acetic acid 1.4C UN0448 II Prohibited Prohibited
• 5-Methylhexan-2-one5-Methylhexan-2-one 3 UN2302 III Prohibited 3A
• 5-Nitrobenzotriazol5-Nitrobenzotriazol 1.1D UN0385 II Prohibited Prohibited
• 5-tert-Butyl-2,4,6-trinitro-m-xylene or Musk xylene5-tert-Butyl-2,4,6-trinitro-m-xyleneor Musk xylene 4.1 UN2956 III Prohibited Prohibited
• 5-tert-Butyl-2,4,6-trinitro-m-xyleneor Musk xylene · USPS5-tert-Butyl-2,4,6-trinitro-m-xyleneor Musk xylene 4.1 UN2956 III Prohibited Prohibited
• 6-Nitro-4-diazotoluene-3-sulfonic acid (dry)6-Nitro-4-diazotoluene-3-sulfonic acid (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• 9-Phosphabicyclononanes or Cyclooctadiene phosphines9-Phosphabicyclononanes or Cyclooctadiene phosphines 4.2 UN2940 II Prohibited Prohibited
• a,a’-Di-(nitroxy) methylethera,a’-Di-(nitroxy) methylether Forbidden Prohibited Prohibited Prohibited Prohibited
• a-Methylglucoside tetranitratea-Methylglucoside tetranitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• a-Methylglycerol trinitratea-Methylglycerol trinitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• AcetalAcetal 3 UN1088 II Prohibited 3A
• AcetaldehydeAcetaldehyde 3 UN1089 I Prohibited Prohibited
• Acetaldehyde ammoniaAcetaldehyde ammonia 9 UN1841 III Prohibited 9C
• Acetaldehyde oximeAcetaldehyde oxime 3 UN2332 III Prohibited 3A
• Acetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by massAcetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by mass 8 UN2789 II 8A 8A
• Acetic acid solution, not less than 50 percent but not more than 80 percent acid, by massAcetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass 8 UN2790 II 8A 8A
• Acetic acid solution, with more than 10 percent and less than 50 percent acid, by massAcetic acid solution, with more than 10 percent and less than 50 percent acid, by mass 8 UN2790 III 8A 8A
• Acetic acid (UN2790)Acetic Acid (UN2790): May be mailable if they meet Limited Quantity requirements for air or surface material, contains less than 80 percent acid, and does not exceed 1 pint.
• Acetic anhydrideAcetic anhydride 8 UN1715 II 8A 8A
• AcetoneAcetone 3 UN1090 II Prohibited 3A
• Acetone cyanohydrin, stabilizedAcetone cyanohydrin, stabilized 6.1 UN1541 I Prohibited Prohibited
• Acetone oilsAcetone oils 3 UN1091 II Prohibited 3A
• Acetone (UN1090), Benzene (UN1114), Hexane(s) (UN1208)Acetone (UN1090) normally has a flashpoint of 0° F, Benzene (UN1114) normally has a flashpoint of 12° F, and Hexane(s) (UN1208) normally have flashpoints in the vicinity of -15° F.
• AcetonitrileAcetonitrile 3 UN1648 II Prohibited 3A
• Acetyl acetone peroxide with more than 9 percent by mass active oxygenAcetyl acetone peroxide with more than 9 percent by mass active oxygen Forbidden Prohibited Prohibited Prohibited Prohibited
• Acetyl benzoyl peroxide, solid, or with more than 40 percent in solutionAcetyl benzoyl peroxide, solid, or with more than 40 percent in solution Forbidden Prohibited Prohibited Prohibited Prohibited
• Acetyl bromideAcetyl bromide 8 UN1716 II 8A 8A
• Acetyl chlorideAcetyl chloride 3 UN1717 II Prohibited Prohibited
• Acetyl cyclohexanesulfonyl peroxide, with more than 82 percent wetted with less than 12 percent waterAcetyl cyclohexanesulfonyl peroxide, with more than 82 percent wetted with less than 12 percent water Forbidden Prohibited Prohibited Prohibited Prohibited
• Acetyl iodideAcetyl iodide 8 UN1898 II 8A 8A
• Acetyl methyl carbinolAcetyl methyl carbinol 3 UN2621 III Prohibited 3A
• Acetyl peroxide, solid, or with more than 25 percent in solutionAcetyl peroxide, solid, or with more than 25 percent in solution Forbidden Prohibited Prohibited Prohibited Prohibited
• Acetylene, dissolvedAcetylene, dissolved 2.1 UN1001 n/a Prohibited Prohibited
• Acetylene (liquified)Acetylene (liquified) Forbidden Prohibited Prohibited Prohibited Prohibited
• Acetylene silver nitrateAcetylene silver nitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• Acetylene, solvent freeAcetylene, solvent free Forbidden Prohibited Prohibited Prohibited Prohibited
• AcridineAcridine 6.1 UN2713 III 6A 6A
• Acrolein dimer, stabilizedAcrolein dimer, stabilized 3 UN2607 III Prohibited 3A
• Acrolein, stabilizedAcrolein, stabilized 6.1 UN1092 I Prohibited Prohibited
• Acrylamide, solidAcrylamide, solid 6.1 UN2074 III 6A 6A
• Acrylamide, solutionAcrylamide, solution 6.1 UN3426 III 6A 6A
• Acrylic acid, stabilizedAcrylic acid, stabilized 8 UN2218 II 8A 8A
• Acrylonitrile, stabilizedAcrylonitrile, stabilized 3 UN1093 I Prohibited Prohibited
• Adhesives and cements (UN1133)52/pub52apxc_001.htm#ep999476> Appendix C must be followed. Adhesives and Cements (UN1133): A flammable liquid with an approximate flashpoint of 73° F (23° C) is mailable only if i
• Adhesives, containing a flammable liquidAdhesives, containing a flammable liquid 3 UN1133 I, II, III Prohibited 3A
• AdiponitrileAdiponitrile 6.1 UN2205 III 6A 6A
• Aerosol deodorantAerosol deodorant | Flammable aerosol | UN1950
• Aerosol paint products (flammable compressed gas)Aerosol Paint Products: Aerosol paint products that are defined as flammable compressed gases are acceptable in the domestic mail via surface transportation only if they can qualif
• Aerosol spraysregulated contents (perfume, nail polish, aerosol sprays, electronics with lithium-ion batteries)
• AerosolsMake sure you read about the specific rules and restrictions for sending mailable gases.
• Aerosols (all types regardless of contents — hairspray, deodorant, cooking spray, spray paint, dry shampoo, aerosol sunscreen)Pressurized containers — any aerosol regardless of contents: hairspray, deodorant, cooking spray, spray paint, dry shampoo, aerosol sunscreen
• Aerosols, corrosive, Packing Group II or III, (each not exceeding 1 L capacity)Aerosols, corrosive, Packing Group II or III, (each not exceeding 1 L capacity) 2.2 UN1950 n/a 2B 2B
• Aerosols, flammable (each not exceeding 1 L capacity)Aerosols, flammable (each not exceeding 1 L capacity) 2.1 UN1950 n/a Prohibited 2A
• Aerosols, flammable, n.o.s. (engine starting fluid) (each not exceeding 1 L capacity)Aerosols, flammable, n.o.s. (engine starting fluid) (each not exceeding 1 L capacity) 2.1 UN1950 n/a Prohibited 2A
• Aerosols, nonflammable (each not exceeding 1 L capacity)Aerosols, nonflammable (each not exceeding 1 L capacity) 2.2 UN1950 n/a 2B 2B
• Aerosols, poison, each not exceeding 1 L capacityAerosols, poison, each not exceeding 1 L capacity 2.2 UN1950 n/a 2B 2B
• Air bag inflators, or Air bag modules, or Seatbelt pretensionersAir bag inflators, or Air bag modules, or Seatbelt pretensioners 1.4G UN0503 II Prohibited Prohibited
• Air BagsYou can't send these items in the U.S. mail: Air Bags
• Air, compressedAir, compressed 2.2 UN1002 n/a 2B 2B
• air gunsAir guns are devices that expel projectiles using compressed air or other gas (including paintball and pellet guns). Air guns are not regulated as firearms unless they are manufact
• air guns - high muzzle velocityShipments containing air guns with a muzzle velocity of 400 or more feet per second (fps) must include an Adult Signature service per DMM 503.8.
• Air, refrigerated liquid (cryogenic liquid)Air, refrigerated liquid (cryogenic liquid) 2.2 UN1003 n/a Prohibited Prohibited
• Air, refrigerated liquid (cryogenic liquid), nonpressurizedAir, refrigerated liquid (cryogenic liquid), nonpressurized 2.2 UN1003 n/a Prohibited Prohibited
• Aircraft hydraulic power unit fuel tank (containing a mixture of anhydrous hydrazine and monomethyl hydrazine) (M86 fuel) · USPSAircraft hydraulic power unit fuel tank (containing a mixture of anhydrous hydrazine and monomethyl hydrazine) (M86 fuel) 3 UN3165 I Prohibited Prohibited
• Alcoholates solution, n.o.s., in alcohol · USPSAlcoholates solution, n.o.s., in alcohol 3 UN3274 II Prohibited Prohibited
• Alcoholic BeveragesBeer, wine, and liquor may not be sent through the mail, except in limited circumstances.
• Alcohols, flammable, toxic, n.o.s.Alcohols, flammable, toxic, n.o.s. 3 UN1986 I, II, III Prohibited Prohibited
• AldolAldol 6.1 UN2839 II Prohibited Prohibited
• Aldrin, liquidAldrin, liquid 6.1 NA2762 II Prohibited Prohibited
• Aldrin, solidAldrin, solid 6.1 NA2761 II Prohibited Prohibited
• Alkali metal alcoholates, self-heating, corrosive, n.o.s.Alkali metal alcoholates, self-heating, corrosive, n.o.s. 4.2 UN3206 II, III Prohibited Prohibited
• Alkali metal alloys, liquid, n.o.s.Alkali metal alloys, liquid, n.o.s. 4.3 UN1421 I Prohibited Prohibited
• Alkali metal amalgam, liquidAlkali metal amalgam, liquid 4.3 UN1389 I Prohibited Prohibited
• Alkali metal amalgam, solidAlkali metal amalgam, solid 4.3 UN3401 I Prohibited Prohibited
• Alkali metal amidesAlkali metal amides 4.3 UN1390 II Prohibited 4A
• Alkali metal dispersions, flammable or Alkaline earth metal dispersions, flammableAlkali metal dispersions, flammable or Alkaline earth metal dispersions, flammable 4.3 UN3482 I Prohibited Prohibited
• Alkali metal dispersions, or Alkaline earth metal dispersionsAlkali metal dispersions, or Alkaline earth metal dispersions 4.3 UN1391 I Prohibited Prohibited
• Alkaline earth metal alcoholates, n.o.s.Alkaline earth metal alcoholates, n.o.s. 4.2 UN3205 II, III Prohibited Prohibited
• Alkaline earth metal alloys, n.o.s.Alkaline earth metal alloys, n.o.s. 4.3 UN1393 II Prohibited 4A
• Alkaline earth metal amalgams, liquidAlkaline earth metal amalgams, liquid 4.3 UN1392 I Prohibited Prohibited
• Alkaline earth metal amalgams, solidAlkaline earth metal amalgams, solid 4.3 UN3402 I Prohibited Prohibited
• Alkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with more than 5 percent free sulfuric acidAlkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with more than 5 percent free sulfuric acid 8 UN2584 II 8A 8A
• Alkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with not more than 5 percent free sulfuric acidAlkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with not more than 5 percent free sulfuric acid 8 UN2586 III 8A 8A
• Alkyl sulfonic acids, solid or Aryl sulfonic acids, solid with more than 5 percent free sulfuric acidAlkyl sulfonic acids, solid or Aryl sulfonic acids, solid with more than 5 percent free sulfuric acid 8 UN2583 II 8A 8A
• Alkyl sulfonic acids, solid or Aryl sulfonic acids, solid with not more than 5 percent free sulfuric acidAlkyl sulfonic acids, solid or Aryl sulfonic acids, solid with not more than 5 percent free sulfuric acid 8 UN2585 III 8A 8A
• Alkylphenols, liquid, n.o.s. (including C2-C12 homologues)Alkylphenols, liquid, n.o.s. (including C2-C12 homologues) 8 UN3145 II, III 8A 8A
• Alkylphenols, liquid, n.o.s. (including C2C12 homologues)Alkylphenols, liquid, n.o.s. (including C2C12 homologues) 8 UN3145 I Prohibited Prohibited
• Alkylsulfuric acidsAlkylsulfuric acids 8 UN2571 II 8A 8A
• All flammable liquids with flashpoint of 20 F (-7 C) or belowAll flammable liquids having a flashpoint of 20° F (-7° C) or below are prohibited from mailing.
• Allyl acetateAllyl acetate 3 UN2333 II Prohibited Prohibited
• Allyl alcoholAllyl alcohol 6.1 UN1098 I Prohibited Prohibited
• Allyl bromideAllyl bromide 3 UN1099 I Prohibited Prohibited
• Allyl chlorideAllyl chloride 3 UN1100 I Prohibited Prohibited
• Allyl chloroformateAllyl chloroformate 6.1 UN1722 I Prohibited Prohibited
• Allyl ethyl etherAllyl ethyl ether 3 UN2335 II Prohibited Prohibited
• Allyl formateAllyl formate 3 UN2336 I Prohibited Prohibited
• Allyl glycidyl etherAllyl glycidyl ether 3 UN2219 III Prohibited 3A
• Allyl iodideAllyl iodide 3 UN1723 II Prohibited Prohibited
• Allyl isothiocyanate, stabilizedAllyl isothiocyanate, stabilized 6.1 UN1545 II Prohibited Prohibited
• AllylamineAllylamine 6.1 UN2334 I Prohibited Prohibited
• Allyltrichlorosilane, stabilizedAllyltrichlorosilane, stabilized 8 UN1724 II Prohibited Prohibited
• alpha-Methylbenzyl alcohol, liquidalpha-Methylbenzyl alcohol, liquid 6.1 UN2937 III 6A 6A
• alpha-Methylbenzyl alcohol, solidalpha-Methylbenzyl alcohol, solid 6.1 UN3438 III 6A 6A
• alpha-Methylvaleraldehydealpha-Methylvaleraldehyde 3 UN2367 II Prohibited 3A
• Alpha-NaphthylamineAlpha-Naphthylamine 6.1 UN2077 III 6A 6A
• Alpha-PineneAlpha-Pinene 3 UN2368 III Prohibited 3A
• Aluminum borohydride or Aluminum borohydride in devicesAluminum borohydride or Aluminum borohydride in devices 4.2 UN2870 I Prohibited Prohibited
• Aluminum bromide, anhydrousAluminum bromide, anhydrous 8 UN1725 II 8A 8A
• Aluminum bromide, solutionAluminum bromide, solution 8 UN2580 III 8A 8A
• Aluminum carbideAluminum carbide 4.3 UN1394 II Prohibited 4A
• Aluminum chloride, anhydrousAluminum chloride, anhydrous 8 UN1726 II 8A 8A
• Aluminum chloride, solutionAluminum chloride, solution 8 UN2581 III 8A 8A
• Aluminum dross, wet or hotAluminum dross, wet or hot Forbidden Prohibited Prohibited Prohibited Prohibited
• Aluminum ferrosilicon powderAluminum ferrosilicon powder 4.3 UN1395 II, III Prohibited 4A
• Aluminum hydrideAluminum hydride 4.3 UN2463 I Prohibited Prohibited
• Aluminum, moltenAluminum, molten 9 NA9260 III Prohibited Prohibited
• Aluminum, nitrateAluminum, nitrate 5.1 UN1438 III 5A 5A
• Aluminum phosphide · USPSAluminum phosphide 4.3 UN1397 I Prohibited Prohibited
• Aluminum phosphide pesticidesAluminum phosphide pesticides 6.1 UN3048 I Prohibited Prohibited
• Aluminum powder, coatedAluminum powder, coated 4.1 UN1309 II, III Prohibited 4A
• Aluminum powder, uncoatedAluminum powder, uncoated 4.3 UN1396 II, III Prohibited 4A
• Aluminum resinateAluminum resinate 4.1 UN2715 III Prohibited 4A
• Aluminum silicon powder, uncoatedAluminum silicon powder, uncoated 4.3 UN1398 III Prohibited 4A
• Aluminum smelting by-products or Aluminum remelting by-productsAluminum smelting by-products or Aluminum remelting by-products 4.3 UN3170 II, III Prohibited Prohibited
• Amine, liquid, corrosive, flammable, n.o.s. or Polyamines, liquid, corrosive, flammable, n.o.s.Amine, liquid, corrosive, flammable, n.o.s. or Polyamines, liquid, corrosive, flammable, n.o.s. 8 UN2734 I, II Prohibited Prohibited
• Aminophenols (o-; m-; p-)Aminophenols (o-; m-; p-) 6.1 UN2512 III 6A 6A
• Aminopyridines (o-; m-; p-) · USPSAminopyridines (o-; m-; p-) 6.1 UN2671 II Prohibited Prohibited
• Ammonia, anhydrous (domestic)Ammonia, anhydrous (domestic) 2.2 UN1005 n/a Prohibited Prohibited
• Ammonia, anhydrous (international)Ammonia, anhydrous (international) 2.3 UN1005 n/a Prohibited Prohibited
• Ammonia solution, relative density between 0.880 and 0.957 at 15° C in water, with more than 10 percent but not more than 35 percent ammoniaAmmonia solution, relative density between 0.880 and 0.957 at 15° C in water, with more than 10 percent but not more than 35 percent ammonia 8 UN2672 III 8A 8A
• Ammonia solution, relative density less than 0.880 at 15° C in water, with more than 50 percent ammoniaAmmonia solution, relative density less than 0.880 at 15° C in water, with more than 50 percent ammonia 2.2 UN3318 n/a Prohibited Prohibited
• Ammonia solution, relative density less than 0.880 at 15° C in water, with more than 35 percent but not more than 50 percent ammonia · USPSAmmonia solution, relative density less than 0.880 at 15° C in water, with more than 35 percent but not more than 50 percent ammonia 2.2 UN2073 n/a Prohibited Prohibited
• Ammonium arsenateAmmonium arsenate 6.1 UN1546 II Prohibited Prohibited
• Ammonium azideAmmonium azide Forbidden Prohibited Prohibited Prohibited Prohibited
• Ammonium bromateAmmonium bromate Forbidden Prohibited Prohibited Prohibited Prohibited
• Ammonium chlorateAmmonium chlorate Forbidden Prohibited Prohibited Prohibited Prohibited
• Ammonium dichromateAmmonium dichromate 5.1 UN1439 II 5A 5A
• Ammonium dinitro-o-cresolate, solidAmmonium dinitro-o-cresolate, solid 6.1 UN1843 II Prohibited Prohibited
• Ammonium dinitro-o-cresolate, solutionAmmonium dinitro-o-cresolate, solution 6.1 UN3424 II Prohibited Prohibited
• Ammonium fluorideAmmonium fluoride 6.1 UN2505 III 6A 6A
• Ammonium fluorosilicateAmmonium fluorosilicate 6.1 UN2854 III 6A 6A
• Ammonium fulminateAmmonium fulminate Forbidden Prohibited Prohibited Prohibited Prohibited
• Ammonium hydrogen sulfateAmmonium hydrogen sulfate 8 UN2506 II 8A 8A
• Ammonium hydrogendifluoride, solidAmmonium hydrogendifluoride, solid 8 UN1727 II 8A 8A
• Ammonium metavanadate · USPSAmmonium metavanadate 6.1 UN2859 II Prohibited Prohibited
• Ammonium nitrateAmmonium nitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• Ammonium nitrate based fertilizersAmmonium nitrate based fertilizers 5.1 UN2067 III 5A 5A
• Ammonium nitrate fertilizersAmmonium nitrate fertilizers 5.1 NA2072 III 5A 5A
• Ammonium nitrate-fuel oil mixture containing only prilled ammonium nitrate and fuel oilAmmonium nitrate-fuel oil mixture containing only prilled ammonium nitrate and fuel oil 1.5D NA0331 II Prohibited Prohibited
• Ammonium nitrate, liquid (hot concentrated solution)Ammonium nitrate, liquid (hot concentrated solution) 5.1 UN2426 n/a Prohibited Prohibited
• Ammonium nitrate mixed fertilizersAmmonium nitrate mixed fertilizers 5.1 NA2069 III 5A 5A
• Ammonium nitrate, with more than 0.2 percent combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substanceAmmonium nitrate, with more than 0.2 percent combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance 1.1D UN0222
• Ammonium nitrate, with not more than 0.2 percent of combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substanceAmmonium nitrate, with not more than 0.2 percent of combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance 5.1
• Ammonium perchlorateAmmonium perchlorate 1.1D UN0402 II Prohibited Prohibited
• Ammonium permanganateAmmonium permanganate Forbidden Prohibited Prohibited Prohibited Prohibited
• Ammonium persulfateAmmonium persulfate 5.1 UN1444 III 5A 5A
• Ammonium picrate, dry or wetted with less than 10 percent water, by massAmmonium picrate, dry or wetted with less than 10 percent water, by mass 1.1D UN0004 II Prohibited Prohibited
• Ammonium picrate, wetted with not less than 10 percent water, by massAmmonium picrate, wetted with not less than 10 percent water, by mass 4.1 UN1310 I Prohibited Prohibited
• Ammonium polyvanadateAmmonium polyvanadate 6.1 UN2861 II 6A 6A
• Ammonium sulfide solutionAmmonium sulfide solution 8 UN2683 II Prohibited Prohibited
• AmmunitionItems You can't send these items in the U.S. mail: Air Bags Ammunition Explosives Gasoline Liquid Mercury Marijuana (medical or otherwise); hemp/CBD is allowed, but restricted Dome
• Ammunition, illuminating with or without burster, expelling charge, or propelling chargeAmmunition, illuminating with or without burster, expelling charge, or propelling charge 1.2G UN0171 II Prohibited Prohibited
• Ammunition, incendiary liquid or gel, with burster, expelling charge, or propelling chargeAmmunition, incendiary liquid or gel, with burster, expelling charge, or propelling charge 1.3J UN0247 II Prohibited Prohibited
• Ammunition, incendiary, white phosphorus, with burster, expelling charge, or propelling chargeAmmunition, incendiary, white phosphorus, with burster, expelling charge, or propelling charge 1.3H UN0244 II Prohibited Prohibited
• Ammunition, incendiary with or without burster, expelling charge, or propelling chargeAmmunition, incendiary with or without burster, expelling charge, or propelling charge 1.2G UN0009 II Prohibited Prohibited
• Ammunition, practiceAmmunition, practice 1.4G UN0362 II Prohibited Prohibited
• Ammunition, proofAmmunition, proof 1.4G UN0363 II Prohibited Prohibited
• Ammunition, smoke, white phosphorus with burster, expelling charge, or propelling chargeAmmunition, smoke, white phosphorus with burster, expelling charge, or propelling charge 1.3H UN0246 II Prohibited Prohibited
• Ammunition smoke, white phosphorus with burster, expelling charge, or propelling charge · USPSAmmunition smoke, white phosphorus with burster, expelling charge, or propelling charge 1.2H UN0245 II Prohibited Prohibited
• Ammunition, smoke, with or without burster, expelling charge, or propelling chargeAmmunition, smoke, with or without burster, expelling charge, or propelling charge 1.2G UN0015 II Prohibited Prohibited
• Ammunition, tear-producing, nonexplosive, without burster or expelling charge, non-fuzed · USPSAmmunition, tear-producing, nonexplosive, without burster or expelling charge, non-fuzed 6.1 UN2017 II Prohibited Prohibited
• Ammunition, tear-producing with burster, expelling charge, or propelling chargeAmmunition, tear-producing with burster, expelling charge, or propelling charge 1.2G UN0018 II Prohibited Prohibited
• Ammunition, toxic, nonexplosive, without burster or expelling charge, non-fuzed · USPSAmmunition, toxic, nonexplosive, without burster or expelling charge, non-fuzed 6.1 UN2016 II Prohibited Prohibited
• Ammunition, toxic with burster, expelling charge, or propelling chargeAmmunition, toxic with burster, expelling charge, or propelling charge 1.2K UN0020 II Prohibited Prohibited
• Amyl acetatesAmyl acetates 3 UN1104 III Prohibited 3A
• Amyl acid phosphateAmyl acid phosphate 8 UN2819 III 8A 8A
• Amyl butyratesAmyl butyrates 3 UN2620 III Prohibited 3A
• Amyl chloridesAmyl chlorides 3 UN1107 II Prohibited 3A
• Amyl formatesAmyl formates 3 UN1109 III Prohibited 3A
• Amyl mercaptansAmyl mercaptans 3 UN1111 II Prohibited Prohibited
• Amyl nitrateAmyl nitrate 3 UN1112 III Prohibited 3A
• Amyl nitritesAmyl nitrites 3 UN1113 II Prohibited 3A
• AmyltrichlorosilaneAmyltrichlorosilane 8 UN1728 II Prohibited Prohibited
• AnilineAniline 6.1 UN1547 II Prohibited Prohibited
• Aniline hydrochlorideAniline hydrochloride 6.1 UN1548 III 6A 6A
• AnisidinesAnisidines 6.1 UN2431 III 6A 6A
• AnisoleAnisole 3 UN2222 III Prohibited 3A
• Anisoyl chlorideAnisoyl chloride 8 UN1729 II 8A 8A
• Antimony compounds, inorganic, liquid, n.o.s.Antimony compounds, inorganic, liquid, n.o.s. 6.1 UN3141 III 6A 6A
• Antimony compounds, inorganic, solid, n.o.s.Antimony compounds, inorganic, solid, n.o.s. 6.1 UN1549 III 6A 6A
• Antimony lactateAntimony lactate 6.1 UN1550 III 6A 6A
• Antimony pentachloride, liquidAntimony pentachloride, liquid 8 UN1730 II Prohibited Prohibited
• Antimony pentachloride, solutionsAntimony pentachloride, solutions 8 UN1731 II, III 8A 8A
• Antimony pentafluorideAntimony pentafluoride 8 UN1732 II Prohibited Prohibited
• Antimony potassium tartrateAntimony potassium tartrate 6.1 UN1551 III 6A 6A
• Antimony powderAntimony powder 6.1 UN2871 III 6A 6A
• Antimony sulfide and a chlorate, mixtures ofAntimony sulfide and a chlorate, mixtures of Forbidden Prohibited Prohibited Prohibited Prohibited
• Antimony tribromide, solidAntimony tribromide, solid 8 NA1549 II 8A 8A
• Antimony tribromide, solutionAntimony tribromide, solution 8 NA1549 II 8A 8A
• Antimony trichloride, liquidAntimony trichloride, liquid 8 UN1733 II 8A 8A
• Antimony trichloride, solidAntimony trichloride, solid 8 UN1733 II 8A 8A
• Antimony, trifluoride, solidAntimony, trifluoride, solid 8 NA1549 II 8A 8A
• Antimony, trifluoride, solutionAntimony, trifluoride, solution 8 NA1549 II 8A 8A
• Argon, compressed · USPSArgon, compressed 2.2 UN1006 n/a 2B 2B
• Argon, refrigerated liquid (cryogenic liquid)Argon, refrigerated liquid (cryogenic liquid) 2.2 UN1951 n/a Prohibited Prohibited
• ArsenicArsenic 6.1 UN1558 II Prohibited Prohibited
• Arsenic acid, liquidArsenic acid, liquid 6.1 UN1553 I Prohibited Prohibited
• Arsenic acid, solidArsenic acid, solid 6.1 UN1554 II Prohibited Prohibited
• Arsenic bromideArsenic bromide 6.1 UN1555 II Prohibited Prohibited
• Arsenic pentoxideArsenic pentoxide 6.1 UN1559 II Prohibited Prohibited
• Arsenic sulfideArsenic sulfide 6.1 NA1557 II Prohibited Prohibited
• Arsenic sulfide and a chlorate, mixtures ofArsenic sulfide and a chlorate, mixtures of Forbidden Prohibited Prohibited Prohibited Prohibited
• Arsenic trichlorideArsenic trichloride 6.1 UN1560 I Prohibited Prohibited
• Arsenic trioxideArsenic trioxide 6.1 UN1561 II Prohibited Prohibited
• Arsenic trisulfideArsenic trisulfide 6.1 NA1557 II Prohibited Prohibited
• Arsenical dustArsenical dust 6.1 UN1562 II Prohibited Prohibited
• Arsenical pesticides, liquid, flammable, toxic, flashpoint less than 23° CArsenical pesticides, liquid, flammable, toxic, flashpoint less than 23° C 3 UN2760 I, II Prohibited Prohibited
• ArsineArsine 2.3 UN2188 n/a Prohibited Prohibited
• Articles, explosive, extremely insensitive or Articles, EEIArticles, explosive, extremely insensitive or Articles, EEI 1.6N UN0486 II Prohibited Prohibited
• Articles, explosive, n.o.s.Articles, explosive, n.o.s. 1.4S UN0349 II Prohibited Prohibited
• Articles made from natural or depleted uranium or natural thorium (UN2909)UN2909: Manufactured articles containing only natural or depleted uranium or thorium, categorized as excepted package-articles manufactured from uranium or depleted uranium or natu
• Articles, pressurized pneumatic or Hydraulic containing nonflammable gasArticles, pressurized pneumatic or Hydraulic containing nonflammable gas 2.2 UN3164 n/a 2B 2B
• Articles, pyrophoricArticles, pyrophoric 1.2L UN0380 II Prohibited Prohibited
• Articles, pyrotechnic for technical purposesArticles, pyrotechnic for technical purposes 1.1G UN0428 II Prohibited Prohibited
• AsbestosAsbestos 9 NA2212 III Prohibited 9C
• Ascaridole (organic peroxide)Ascaridole (organic peroxide) Forbidden Prohibited Prohibited Prohibited Prohibited
• Asphalt, at or above its flashpointAsphalt, at or above its flashpoint 3 NA1999 III Prohibited 3A
• Audible fire alarm systems powered by compressed gasAudible Fire Alarm Systems: These systems, if powered by compressed gas, are acceptable in domestic mail via surface transportation if they comply with conditions in Packaging Inst
• Aviation regulated liquid, n.o.s. · USPSAviation regulated liquid, n.o.s. 9 UN3334 n/a 9C 9C
• Aviation regulated solid, n.o.s.Aviation regulated solid, n.o.s. 9 UN3335 n/a 9C 9C
• Azaurolic, acid (salt of), (dry)Azaurolic, acid (salt of), (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Azido guanidine picrate (dry)Azido guanidine picrate (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Azido hydroxy tetrazole (mercury and silver salts)Azido hydroxy tetrazole (mercury and silver salts) Forbidden Prohibited Prohibited Prohibited Prohibited
• Azidodithiocarbonic acidAzidodithiocarbonic acid Forbidden Prohibited Prohibited Prohibited Prohibited
• Azidoethyl nitrateAzidoethyl nitrate Forbidden Prohibited Prohibited Prohibited Prohibited
• AzodicarbonamideAzodicarbonamide 4.1 UN3242 II Prohibited 4A
• Azotetrazole (dry)Azotetrazole (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• BariumBarium 4.3 UN1400 II Prohibited 4A
• Barium alloys, pyrophicBarium alloys, pyrophic 4.2 UN1854 I Prohibited Prohibited
• Barium azide, dry or wetted with less than 50 percent water, by massBarium azide, dry or wetted with less than 50 percent water, by mass 1.1A UN0224 II Prohibited Prohibited
• Barium azide, wetted with not less than 50 percent water, by massBarium azide, wetted with not less than 50 percent water, by mass 4.1 UN1571 I Prohibited Prohibited
• Barium bromateBarium bromate 5.1 UN2719 II Prohibited Prohibited
• Barium chlorate, solidBarium chlorate, solid 5.1 UN1445 II Prohibited Prohibited
• Barium chlorate, solutionBarium chlorate, solution 5.1 UN3405 II Prohibited Prohibited
• Barium cyanideBarium cyanide 6.1 UN1565 I Prohibited Prohibited
• Barium hypochlorite with more than 22 percent available chlorineBarium hypochlorite with more than 22 percent available chlorine 5.1 UN2741 II 5A 5A
• Barium nitrateBarium nitrate 5.1 UN1446 II Prohibited Prohibited
• Barium oxideBarium oxide 6.1 UN1884 III 6A 6A
• Barium perchlorate, solidBarium perchlorate, solid 5.1 UN1447 II Prohibited Prohibited
• Barium perchlorate, solutionBarium perchlorate, solution 5.1 UN3406 II, III Prohibited Prohibited
• Barium permanganateBarium permanganate 5.1 UN1448 II Prohibited Prohibited
• Barium peroxideBarium peroxide 5.1 UN1449 II Prohibited Prohibited
• Barium styphnateBarium styphnate 1.1A NA0473 II Prohibited Prohibited
• Batteries, containing sodiumBatteries, containing sodium 4.3 UN3292 II Prohibited Prohibited
• Batteries, dry, containing potassium hydroxide solid, electric, storageBatteries, dry, containing potassium hydroxide solid, electric, storage 8 UN3028 III Prohibited Prohibited
• Batteries, nickel-metal hydride see Batteries, dry. Sealed, n.o.s. for nickel metal hydride batteries transported by modes other than vessel · USPSBatteries, nickel-metal hydride see Batteries, dry. Sealed, n.o.s. for nickel metal hydride batteries transported by modes other than vessel 9 UN3496 n/a Prohibited Mailable
• Batteries, wet, filled with acid, electric storage · USPSBatteries, wet, filled with acid, electric storage 8 UN2794 III Prohibited Prohibited
• Batteries, wet, filled with alkali,electric storageBatteries, wet, filled with alkali,electric storage 8 UN2795 III Prohibited Prohibited
• Batteries, wet, nonspillable, electric storageBatteries, wet, nonspillable, electric storage 8 UN2800 III 8B 8B
• Batteries with liquid electrolyte (UN2794, UN2795)Batteries with Liquid Electrolyte (UN2794, UN2795): Includes automobile lead acid batteries, except for the non-spillable type permitted under 348.22 .
• Battery fluid, acidBattery fluid, acid 8 UN2796 II 8A 8A
• Battery fluid, alkaliBattery fluid, alkali 8 UN2797 II 8A 8A
• Battery-powered vehicle or Battery- powered equipment · USPSBattery-powered vehicle or Battery- powered equipment 9 UN3171 n/a Prohibited Prohibited
• Benzaldehyde · USPSBenzaldehyde 9 UN1990 III 9C 9C
• BenzeneBenzene 3 UN1114 II Prohibited 3A
• Benzene diazonium chloride (dry)Benzene diazonium chloride (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Benzene diazonium nitrate (dry)Benzene diazonium nitrate (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Benzene sulfonyl chlorideBenzene sulfonyl chloride 8 UN2225 III 8A 8A
• Benzene triozonideBenzene triozonide Forbidden Prohibited Prohibited Prohibited Prohibited
• BenzidineBenzidine 6.1 UN1885 II Prohibited Prohibited
• BenzonitrileBenzonitrile 6.1 UN2224 II Prohibited Prohibited
• BenzoquinoneBenzoquinone 6.1 UN2587 II Prohibited Prohibited
• BenzotrichlorideBenzotrichloride 8 UN2226 II 8A 8A
• BenzotrifluorideBenzotrifluoride 3 UN2338 II Prohibited 3A
• Benzoxidiazoles (dry)Benzoxidiazoles (dry) Forbidden Prohibited Prohibited Prohibited Prohibited
• Benzoyl azideBenzoyl azide Forbidden Prohibited Prohibited Prohibited Prohibited
• Benzoyl chlorideBenzoyl chloride 8 UN1736 II 8A 8A
• Benzyl bromideBenzyl bromide 6.1 UN1737 II Prohibited Prohibited
• Benzyl chlorideBenzyl chloride 6.1 UN1738 II Prohibited Prohibited
• Benzyl chloride unstabilizedBenzyl chloride unstabilized 6.1 UN1738 II Prohibited Prohibited
• Benzyl chloroformateBenzyl chloroformate 8 UN1739 I Prohibited Prohibited
• Benzyl iodideBenzyl iodide 6.1 UN2653 II Prohibited Prohibited
• BenzyldimethylamineBenzyldimethylamine 8 UN2619 II 8A 8A
• Benzylidene chlorideBenzylidene chloride 6.1 UN1886 II Prohibited Prohibited
• Beryllium nitrateBeryllium nitrate 5.1 UN2464 II Prohibited Prohibited
• Beryllium, powderBeryllium, powder 6.1 UN1567 II Prohibited Prohibited
• Beta-Naphthylamine, solidBeta-Naphthylamine, solid 6.1 UN1650 II Prohibited Prohibited
• Beta-Naphthylamine, solutionBeta-Naphthylamine, solution 6.1 UN3411 II, III Prohibited Prohibited
• Bicyclo [2,2,1] hepta-2, 5-diene, stabilized or 2,5-Norbornadiene, stabilizedBicyclo [2,2,1] hepta-2, 5-diene, stabilized or 2,5-Norbornadiene, stabilized 3 UN2251 II Prohibited 3A
• Biological products exceeding 4 liters or 4 kg containing Category ABiological Products and Specimens: Biological products, cultures, stocks, or other biological specimens known or suspected to contain a Category A infectious substance. Mailpieces
• Biological products or medical preparations in nonrefillable metal containersBiological Products or Medical Preparations: Nonflammable solutions containing biological or medical products in nonrefillable metal containers preparation that heat could deterior
• Biological substance, Category BBiological substance, Category B 6.2 UN3373 n/a 6C 6C
• Biphenyl triozonideBiphenyl triozonide Forbidden Prohibited Prohibited Prohibited Prohibited
• Bipyridilium pesticides, liquid, flammable, toxic, flashpoint less than 23° CBipyridilium pesticides, liquid, flammable, toxic, flashpoint less than 23° C 3 UN2782 I, II Prohibited Prohibited
• Bisulfate, aqueous solutionBisulfate, aqueous solution 8 UN2837 II, III 8A 8A
• Bisulfites, aqueous solutions, n.o.s.Bisulfites, aqueous solutions, n.o.s. 8 UN2693 III 8A 8A
• Black powder, compressed or Gunpowder, compressed or Black powder, in pellets or Gunpowder, in pelletsBlack powder, compressed or Gunpowder, compressed or Black powder, in pellets or Gunpowder, in pellets 1.1D UN0028 II Prohibited Prohibited
• Black powder for small armsBlack powder for small arms 4.1 NA0027 I Prohibited Prohibited
• Black powder or Gunpowder, granular or as a mealBlack powder or Gunpowder, granular or as a meal 1.1D UN0027 II Prohibited Prohibited
• Blood for transfusion containing Category A infectious substanceBlood for Transfusion: Blood collected for transfusion and known or suspected to contain a Category A infectious substance.
• Blue asbestos (Crocidolite) or Brown asbestos (amosite, mysorite) · USPSBlue asbestos (Crocidolite) or Brown asbestos (amosite, mysorite) 9 UN2212 II Prohibited 9C
• Bombs, photo-flashBombs, photo-flash 1.1F UN0037 II Prohibited Prohibited
• Bombs, smoke, non-explosive, with corrosive liquid, without initiating deviceBombs, smoke, non-explosive, with corrosive liquid, without initiating device 8 UN2028 II Prohibited Prohibited
• Bombs, with bursting chargeBombs, with bursting charge 1.1F UN0033 II Prohibited Prohibited
• Bombs with flammable liquid, with bursting chargeBombs with flammable liquid, with bursting charge 1.1J UN0399 II Prohibited Prohibited
• Boosters with detonatorBoosters with detonator 1.1B UN0225 II Prohibited Prohibited
• Boosters, without detonatorBoosters, without detonator 1.1D UN0042 II Prohibited Prohibited
• BorneolBorneol 4.1 UN1312 III Prohibited Prohibited
• Boron tribromideBoron tribromide 8 UN2692 I Prohibited Prohibited
• Boron trichlorideBoron trichloride 2.3 UN1741 n/a Prohibited Prohibited
• Boron trifluorideBoron trifluoride 2.3 UN1008 n/a Prohibited Prohibited
• Boron trifluoride acetic acid complex, liquidBoron trifluoride acetic acid complex, liquid 8 UN1742 II 8A 8A
• Boron trifluoride acetic acid complex, solidBoron trifluoride acetic acid complex, solid 8 UN3419 II 8A 8A
• Boron trifluoride diethyl etherateBoron trifluoride diethyl etherate 8 UN2604 I Prohibited Prohibited
• Boron trifluoride dihydrateBoron trifluoride dihydrate 8 UN2851 II 8A 8A
• Boron trifluoride dimethyl etherateBoron trifluoride dimethyl etherate 4.3 UN2965 I Prohibited Prohibited
• Boron trifluoride propionic acid complex, liquidBoron trifluoride propionic acid complex, liquid 8 UN1743 II 8A 8A
• Boron trifluoride propionic acid complex, solidBoron trifluoride propionic acid complex, solid 8 UN3420 II 8A 8A
• Bromates, inorganic, aqueous solution, n.o.s. · USPSBromates, inorganic, aqueous solution, n.o.s. 5.1 UN3213 II 5A 5A
• Bromates, inorganic, n.o.s.Bromates, inorganic, n.o.s. 5.1 UN1450 II 5A 5A
• Bromine azideBromine azide Forbidden Prohibited Prohibited Prohibited Prohibited
• Bromine chlorideBromine chloride 2.3 UN2901 Prohibited Prohibited Prohibited
• Bromine or Bromine solutionsBromine or Bromine solutions 8 UN1744 I Prohibited Prohibited
• Bromine pentafluorideBromine pentafluoride 5.1 UN1745 I Prohibited Prohibited
• Bromine trifluorideBromine trifluoride 5.1 UN1746 I Prohibited Prohibited
• Bromoacetic acid, solidBromoacetic acid, solid 8 UN3425 II 8A 8A
• Bromoacetic acid, solutionBromoacetic acid, solution 8 UN1938 II 8A 8A
• BromoacetoneBromoacetone 6.1 UN1569 II Prohibited Prohibited
• Bromoacetyl bromideBromoacetyl bromide 8 UN2513 II 8A 8A
• BromobenzeneBromobenzene 3 UN2514 III Prohibited 3A
• Bromobenzyl cyanides, liquidBromobenzyl cyanides, liquid 6.1 UN1694 I Prohibited Prohibited
• Bromobenzyl cyanides, solidBromobenzyl cyanides, solid 6.1 UN3449 I Prohibited Prohibited
• BromochloromethaneBromochloromethane 6.1 UN1887 III 6A 6A
• BromoformBromoform 6.1 UN2515 III 6A 6A
• BromomethylpropanesBromomethylpropanes 3 UN2342 II Prohibited 3A
• BromopropanesBromopropanes 3 UN2344 II, III Prohibited 3A
• BromosilaneBromosilane Forbidden Prohibited Prohibited Prohibited Prohibited
• BromotrifluoroethyleneBromotrifluoroethylene 2.1 UN2419 n/a Prohibited Prohibited
• Bromotrifluoromethane or Refrigerant gas, R 13B1BromotrifluoromethaneorRefrigerant gas, R 13B1 2.2 UN1009 n/a 2B 2B
• BromotrifluoromethaneorRefrigerant gas, R 13B1 · USPSBromotrifluoromethaneorRefrigerant gas, R 13B1 2.2 UN1009 n/a 2B 2B
• BrucineBrucine 6.1 UN1570 I Prohibited Prohibited
• Bursters, explosiveBursters, explosive 1.1D UN0043 II Prohibited Prohibited
• Butadienes, stabilized or Butadienes and Hydrocarbon mixture, stabilized containing more than 40 percent butadienesButadienes, stabilized or Butadienes and Hydrocarbon mixture, stabilized containing more than 40 percent butadienes 2.1 UN1010 n/a Prohibited 2A
• Butane see also Petroleum gases, liquified · USPSButane see also Petroleum gases, liquified 2.1 UN1011 n/a Prohibited 2A
• Butane (UN1011) — Division 2.1 flammable gasButane (UN1011): Division 2.1 flammable gases. Butane or butane mixtures are mailable via surface transportation as Limited Quantity materials
• Butanedione · USPSButanedione 3 UN2346 II Prohibited 3A
• ButanolsButanols 3 UN1120 II, III Prohibited 3A
• Butyl acetatesButyl acetates 3 UN1123 II, III Prohibited 3A
• Butyl acid phosphateButyl acid phosphate 8 UN1718 III 8A 8A
• Butyl acrylates, stabilizedButyl acrylates, stabilized 3 UN2348 III Prohibited 3A
• Butyl benzenesButyl benzenes 3 UN2709 III Prohibited 3A
• Butyl mercaptansButyl mercaptans 3 UN2347 II Prohibited 3A
• Butyl methyl etherButyl methyl ether 3 UN2350 II Prohibited 3A
• Butyl nitritesButyl nitrites 3 UN2351 I, II, III Prohibited 3A
• Butyl propionatesButyl propionates 3 UN1914 III Prohibited 3A
• Butyl vinyl ether, stabilizedButyl vinyl ether, stabilized 3 UN2352 II Prohibited 3A
• Butylene see also Petroleum gases, liquified · USPSButylene see also Petroleum gases, liquified 2.1 UN1012 n/a Prohibited Prohibited
• ButyltoluenesButyltoluenes 6.1 UN2667 III 6A 6A
• ButyltrichlorosilaneButyltrichlorosilane 8 UN1747 II Prohibited Prohibited
• ButyraldehydeButyraldehyde 3 UN1129 II Prohibited 3A
• ButyraldoximeButyraldoxime 3 UN2840 III Prohibited 3A
• Butyric acidButyric acid 8 UN2820 III 8A 8A
• Butyric anhydrideButyric anhydride 8 UN2739 III 8A 8A
• ButyronitrileButyronitrile 3 UN2411 II Prohibited Prohibited
• Butyryl chlorideButyryl chloride 3 UN2353 II Prohibited Prohibited
• Cacodylic acidCacodylic acid 6.1 UN1572 II Prohibited Prohibited
• Caesium hydroxideCaesium hydroxide 8 UN2682 II 8A 8A
• Caesium hydroxide solutionCaesium hydroxide solution 8 UN2681 II, III 8A 8A
• CalciumCalcium 4.3 UN1401 II Prohibited 4A
• Calcium arsenateCalcium arsenate 6.1 UN1573 II Prohibited Prohibited
• Calcium arsenate and calcium arsenite, mixtures, solidCalcium arsenate and calcium arsenite, mixtures, solid 6.1 UN1574 II Prohibited Prohibited
• Calcium arsenite, solidCalcium arsenite, solid 6.1 NA1574 II Prohibited Prohibited
• Calcium chlorateCalcium chlorate 5.1 UN1452 II 5A 5A
• Calcium chlorate aqueous solutionCalcium chlorate aqueous solution 5.1 UN2429 II, III 5A 5A
• Calcium chloriteCalcium chlorite 5.1 UN1453 II 5A 5A

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