49 CFR 172 Special Provision A3 (A-Codes)

These provisions apply only to transportation by aircraft.

Code	A3
Description	For combination packagings, if glass inner packagings (including ampoules) are used, they must be packed with absorbent material in tightly closed metal receptacles before packing in outer packagings.
HazMat with this Code	UN 2258 - 1,2-Propylenediamine UN 2456 - 2-Chloropropene UN 1089 - Acetaldehyde 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 1717 - Acetyl chloride UN 1421 - Alkali metal alloys, liquid, n.o.s UN 1389 - Alkali metal amalgam, liquid UN 3482 - Alkali metal dispersions, flammable or Alkaline earth metal dispersions, flammable UN 1391 - Alkali metal dispersions, or Alkaline earth metal dispersions UN 1723 - Allyl iodide UN 1545 - Allyl isothiocyanate, stabilized UN 2734 - Amine, liquid, corrosive, flammable, n.o.s. or Polyamines, liquid, corrosive, flammable, n.o.s UN 2735 - Amines, liquid, corrosive, n.o.s., or Polyamines, liquid, corrosive, n.o.s. UN 1111 - Amyl mercaptan UN 1732 - Antimony pentafluoride UN 2796 - Battery fluid, acid UN 1737 - Benzyl bromide UN 1738 - Benzyl chloride UN 1738 - Benzyl chloride unstabilized UN 1739 - Benzyl chloroformate UN 2604 - Boron trifluoride diethyl etherate UN 2347 - Butyl mercaptan UN 1908 - Chlorite solution UN 1751 - Chloroacetic acid, solid UN 3416 - Chloroacetophenone, liquid, (CN) UN 1697 - Chloroacetophenone, solid, (CN) UN 1758 - Chromium oxychloride UN 2240 - Chromosulfuric acid UN 1764 - Dichloroacetic acid UN 1765 - Dichloroacetyl chloride UN 1154 - Diethylamine UN 1183 - Ethyldichlorosilane UN 1777 - Fluorosulfonic acid UN 2029 - Hydrazine, anhydrous UN 1787 - Hydriodic acid UN 1788 - Hydrobromic acid, with not more than 49 percent hydrobromic acid UN 1789 - Hydrochloric acid UN 3149 - Hydrogen peroxide and peroxyacetic acid mixtures, stabilized with acids, water, and not more than 5 percent peroxyacetic acid UN 2014 - Hydrogen peroxide, aqueous solutions with not less than 20 percent but not more than 40 percent hydrogen peroxide (stabilized as necessary) UN 2478 - Isocyanates, flammable, toxic, n.o.s. or Isocyanate solutions, flammable, toxic, n.o.s. flash point less than 23 degrees C UN 1411 - Lithium aluminum hydride, ethereal UN 1242 - Methyldichlorosilane UN 2031 - Nitric acid other than red fuming, with more than 70 percent nitric acid UN 1798 - Nitrohydrochloric acid UN 2308 - Nitrosylsulfuric acid, liquid UN 2788 - Organotin compounds, liquid, n.o.s. UN 1873 - Perchloric acid with more than 50 percent but not more than 72 percent acid, by mass UN 1808 - Phosphorus tribromide UN 1280 - Propylene oxide UN 1921 - Propyleneimine, stabilized UN 2879 - Selenium oxychloride UN 1818 - Silicon tetrachloride UN 1906 - Sludge, acid UN 1828 - Sulfur chlorides UN 1830 - Sulfuric acid with more than 51 percent acid UN 2796 - Sulfuric acid with not more than 51% acid UN 1831 - Sulfuric acid, fuming with less than 30 percent free sulfur trioxide UN 1832 - Sulfuric acid, spent UN 1837 - Thiophosphoryl chloride UN 2564 - Trichloroacetic acid, solution UN 2574 - Tricresyl phosphate with more than 3 percent ortho isomer UN 2699 - Trifluoroacetic acid UN 1298 - Trimethylchlorosilane UN 2502 - Valeryl chloride UN 2443 - Vanadium oxytrichloride UN 2444 - Vanadium tetrachloride UN 1302 - Vinyl ethyl ether, stabilized UN 1305 - Vinyltrichlorosilane UN 1701 - Xylyl bromide, liquid UN 3417 - Xylyl bromide, solid

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