49 CFR 172 Special Provision B2 (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	B2
Description	MC 300, MC 301, MC 302, MC 303, MC 305, and MC 306 and DOT 406 cargo tanks are not authorized.
HazMat with this Code	UN 2705 - 1-Pentol UN 2686 - 2-Diethylaminoethanol UN 2051 - 2-Dimethylaminoethanol UN 2790 - Acetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass UN 2789 - Acetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by mass UN 1715 - Acetic anhydride UN 1716 - Acetyl bromide UN 1898 - Acetyl iodide UN 2218 - Acrylic acid, stabilized UN 2584 - Alkyl sulfonic acids, liquid or Aryl sulfonic acids, liquid with more than 5 percent free sulfuric acid UN 2571 - Alkylsulfuric acids UN 1724 - Allyltrichlorosilane, stabilized UN 2735 - Amines, liquid, corrosive, n.o.s., or Polyamines, liquid, corrosive, n.o.s. UN 1728 - Amyltrichlorosilane UN 1729 - Anisoyl chloride UN 1730 - Antimony pentachloride, liquid UN 1731 - Antimony pentachloride, solutions UN 1733 - Antimony trichloride, liquid UN 2796 - Battery fluid, acid UN 2797 - Battery fluid, alkali UN 2226 - Benzotrichloride UN 1736 - Benzoyl chloride UN 2619 - Benzyldimethylamine UN 2837 - Bisulfate, aqueous solution UN 1742 - Boron trifluoride acetic acid complex, liquid UN 3419 - Boron trifluoride acetic acid complex, solid UN 1743 - Boron trifluoride propionic acid complex, liquid UN 3420 - Boron trifluoride propionic acid complex, solid UN 1938 - Bromoacetic acid solution UN 2513 - Bromoacetyl bromide UN 1747 - Butyltrichlorosilane UN 2681 - Caesium hydroxide solution UN 1719 - Caustic alkali liquids, n.o.s. UN 1908 - Chlorite solution UN 1753 - Chlorophenyltrichlorosilane UN 2987 - Chlorosilanes, corrosive, n.o.s UN 1755 - Chromic acid solution UN 1757 - Chromic fluoride, solution NA1760 - Compounds, cleaning liquid UN 3264 - Corrosive liquid, acidic, inorganic, n.o.s UN 3265 - Corrosive liquid, acidic, organic, n.o.s UN 3266 - Corrosive liquid, basic, inorganic, n.o.s UN 3267 - Corrosive liquid, basic, organic, n.o.s. UN 3301 - Corrosive liquid, self-heating, n.o.s. UN 2920 - Corrosive liquids, flammable, n.o.s. UN 1760 - Corrosive liquids, n.o.s. UN 1762 - Cyclohexenyltrichlorosilane UN 1763 - Cyclohexyltrichlorosilane UN 2434 - Dibenzyldichlorosilane UN 1764 - Dichloroacetic acid UN 1765 - Dichloroacetyl chloride UN 1766 - Dichlorophenyltrichlorosilane UN 2079 - Diethylenetriamine UN 2751 - Diethylthiophosphoryl chloride UN 1768 - Difluorophosphoric acid, anhydrous UN 2262 - Dimethylcarbamoyl chloride UN 1769 - Diphenyldichlorosilane UN 1903 - Disinfectants, liquid, corrosive n.o.s. UN 1771 - Dodecyltrichlorosilane UN 2801 - Dyes, liquid, corrosive, n.o.s. or Dye intermediates, liquid, corrosive, n.o.s UN 2435 - Ethylphenyldichlorosilane UN 1775 - Fluoroboric acid UN 1776 - Fluorophosphoric acid anhydrous UN 1778 - Fluorosilicic acid UN 1779 - Formic acid with more than 85% acid by mass UN 1780 - Fumaryl chloride UN 1781 - Hexadecyltrichlorosilane UN 1782 - Hexafluorophosphoric acid UN 1784 - Hexyltrichlorosilane UN 1787 - Hydriodic acid UN 1788 - Hydrobromic acid, with more than 49 percent hydrobromic acid UN 1788 - Hydrobromic acid, with not more than 49 percent hydrobromic acid UN 1791 - Hypochlorite solutions UN 2679 - Lithium hydroxide, solution UN 2264 - N,N-Dimethylcyclohexylamine UN 1826 - Nitrating acid mixtures spent with not more than 50 percent nitric acid UN 1796 - Nitrating acid mixtures with not more than 50 percent nitric acid UN 2031 - Nitric acid other than red fuming with not more than 20 percent nitric acid UN 2031 - Nitric acid other than red fuming, with at least 65 percent, but not more than 70 percent nitric acid UN 2031 - Nitric acid other than red fuming, with more than 20 percent and less than 65 percent nitric acid UN 2305 - Nitrobenzenesulfonic acid UN 2308 - Nitrosylsulfuric acid, liquid UN 1799 - Nonyltrichlorosilane UN 1800 - Octadecyltrichlorosilane UN 1801 - Octyltrichlorosilane UN 3066 - Paint or Paint related material UN 1803 - Phenolsulfonic acid, liquid UN 2798 - Phenyl phosphorus dichloride UN 2799 - Phenyl phosphorus thiodichloride UN 2577 - Phenylacetyl chloride UN 2576 - Phosphorus oxybromide, molten UN 1808 - Phosphorus tribromide UN 1814 - Potassium hydroxide, solution UN 1816 - Propyltrichlorosilane UN 1817 - Pyrosulfuryl chloride UN 2677 - Rubidium hydroxide solution UN 1818 - Silicon tetrachloride UN 1906 - Sludge, acid UN 1819 - Sodium aluminate, solution UN 3320 - Sodium borohydride and sodium hydroxide solution, with not more than 12 percent sodium borohydride and not more than 40 percent sodium hydroxide by mass UN 1824 - Sodium hydroxide solution UN 1827 - Stannic chloride, anhydrous UN 2796 - Sulfuric acid with not more than 51% acid UN 1832 - Sulfuric acid, spent UN 1835 - Tetramethylammonium hydroxide solution UN 3423 - Tetramethylammonium hydroxide, solid UN 1940 - Thioglycolic acid UN 1837 - Thiophosphoryl chloride UN 2564 - Trichloroacetic acid, solution UN 2259 - Triethylenetetramine UN 2502 - Valeryl chloride UN 2443 - Vanadium oxytrichloride

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