49 CFR 172 Special Provision B9 (B-Codes)

These provisions apply only to bulk packagings. Except as otherwise provided in this subchapter, these special provisions do not apply to UN portable tanks or IBCs.

Code	B9
Description	Bottom outlets are not authorized.
HazMat with this Code	UN 2232 - 2-Chloroethanal UN 3023 - 2-Methyl-2-heptanethiol NA9264 - 3,5-Dichloro-2,4,6-trifluoropyridine UN 1541 - Acetone cyanohydrin, stabilized UN 1092 - Acrolein, stabilized UN 1093 - Acrylonitrile, stabilized UN 3516 - Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone B UN 3517 - Adsorbed gas, toxic, flammable, corrosive, n.o.s. Inhalation hazard zone B UN 3514 - Adsorbed gas, toxic, flammable, n.o.s. Inhalation hazard zone B UN 3512 - Adsorbed gas, toxic, n.o.s. Inhalation hazard zone B UN 3518 - Adsorbed gas, toxic, oxidizing, corrosive, n.o.s. Inhalation hazard zone B UN 3515 - Adsorbed gas, toxic, oxidizing, n.o.s. Inhalation hazard zone B UN 1098 - Allyl alcohol UN 1722 - Allyl chloroformate UN 2334 - Allylamine UN 1560 - Arsenic trichloride UN 2692 - Boron tribromide UN 1741 - Boron trichloride UN 1008 - Boron trifluoride UN 3519 - Boron trifluoride, adsorbed UN 1744 - Bromine UN 2901 - Bromine chloride UN 1745 - Bromine pentafluoride UN 1744 - Bromine solutions UN 1746 - Bromine trifluoride UN 1017 - Chlorine UN 2548 - Chlorine pentafluoride UN 1749 - Chlorine trifluoride UN 3520 - Chlorine, adsorbed UN 1695 - Chloroacetone, stabilized UN 2668 - Chloroacetonitrile UN 1752 - Chloroacetyl chloride UN 1580 - Chloropicrin UN 1581 - Chloropicrin and methyl bromide mixtures NA9263 - Chloropivaloyl chloride UN 1754 - Chlorosulfonic acid (with or without sulfur trioxide) UN 3304 - Compressed gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone B UN 3305 - Compressed gas, toxic, flammable, corrosive, n.o.s. Inhalation Hazard Zone B UN 1953 - Compressed gas, toxic, flammable, n.o.s. Inhalation hazard Zone B UN 1955 - Compressed gas, toxic, n.o.s. Inhalation Hazard Zone B UN 3306 - Compressed gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone B UN 3303 - Compressed gas, toxic, oxidizing, n.o.s. Inhalation Hazard Zone B UN 1143 - Crotonaldehyde or Crotonaldehyde, stabilized UN 2488 - Cyclohexyl isocyanate UN 2189 - Dichlorosilane UN 2521 - Diketene, stabilized UN 1595 - Dimethyl sulfate UN 2382 - Dimethylhydrazine, symmetrical UN 1163 - Dimethylhydrazine, unsymmetrical UN 1182 - Ethyl chloroformate UN 2826 - Ethyl chlorothioformate UN 2481 - Ethyl isocyanate NA2927 - Ethyl phosphonothioic dichloride, anhydrous NA2845 - Ethyl phosphonous dichloride, anhydrous pyrophoric liquid NA2927 - Ethyl phosphorodichloridate UN 1892 - Ethyldichloroarsine UN 1135 - Ethylene chlorohydrin UN 1605 - Ethylene dibromide UN 1185 - Ethyleneimine, stabilized UN 2646 - Hexachlorocyclopentadiene UN 2420 - Hexafluoroacetone UN 3294 - Hydrogen cyanide, solution in alcohol with not more than 45 percent hydrogen cyanide UN 1053 - Hydrogen sulfide UN 3355 - Insecticide gases, toxic, flammable, n.o.s. Inhalation hazard Zone B UN 1994 - Iron pentacarbonyl UN 2486 - Isobutyl isocyanate UN 2407 - Isopropyl chloroformate UN 2483 - Isopropyl isocyanate UN 3309 - Liquefied gas toxic, flammable, corrosive, n.o.s. Inhalation Hazard Zone B UN 3308 - Liquefied gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone B UN 3160 - Liquefied gas, toxic, flammable, n.o.s. Inhalation Hazard Zone B UN 3162 - Liquefied gas, toxic, n.o.s. Inhalation Hazard Zone B UN 3310 - Liquefied gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone B UN 3307 - Liquefied gas, toxic, oxidizing, n.o.s. Inhalation Hazard Zone B UN 3079 - Methacrylonitrile, stabilized UN 3246 - Methanesulfonyl chloride UN 2605 - Methoxymethyl isocyanate UN 1647 - Methyl bromide and ethylene dibromide mixtures, liquid UN 1238 - Methyl chloroformate UN 1239 - Methyl chloromethyl ether UN 2644 - Methyl iodide UN 2480 - Methyl isocyanate UN 2477 - Methyl isothiocyanate UN 1064 - Methyl mercaptan UN 2606 - Methyl orthosilicate NA9206 - Methyl phosphonic dichloride NA2845 - Methyl phosphonous dichloride, pyrophoric liquid UN 1251 - Methyl vinyl ketone, stabilized UN 2534 - Methylchlorosilane UN 1244 - Methylhydrazine UN 1649 - Motor fuel anti-knock mixtures UN 2743 - n-Butyl chloroformate UN 2485 - n-Butyl isocyanate UN 2740 - n-Propyl chloroformate UN 2482 - n-Propyl isocyanate UN 2032 - Nitric acid, red fuming UN 1670 - Perchloromethyl mercaptan UN 3083 - Perchloryl fluoride UN 2487 - Phenyl isocyanate UN 2337 - Phenyl mercaptan UN 1672 - Phenylcarbylamine chloride UN 1810 - Phosphorous oxychloride UN 2198 - Phosphorus Pentafluoride UN 3524 - Phosphorus pentafluoride, adsorbed UN 1809 - Phosphorus trichloride UN 2447 - Phosphorus white, molten UN 1338 - Phosphorus, amorphous UN 1381 - 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 solution UN 1428 - Sodium UN 1829 - Sulfur trioxide, stabilized UN 1831 - Sulfuric acid, fuming with 30 percent or more free sulfur trioxide UN 1834 - Sulfuryl chloride UN 2484 - tert-Butyl isocyanate UN 2474 - Thiophosgene UN 1838 - Titanium tetrachloride UN 3390 - Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 UN 3389 - Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3489 - Toxic by inhalation liquid, flammable, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 UN 3488 - Toxic by inhalation liquid, flammable, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3384 - Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 UN 3383 - Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3382 - Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 UN 3381 - Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3388 - Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 UN 3387 - Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3491 - Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 UN 3490 - Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3386 - Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50 UN 3385 - Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 2442 - Trichloroacetyl chloride UN 3057 - Trifluoroacetyl chloride NA9269 - Trimethoxysilane UN 2438 - Trimethylacetyl chloride

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