The NA numbers (North American Numbers) are assigned by the United States Department of Transportation, supplementing the larger set of UN numbers, for identifying hazardous materials. NA numbers largely duplicate UN numbers, however a selection of additional numbers are provided for materials that are not covered by UN numbers as a hazardous material. In a couple of instances NA numbers provide an alternative description than the equivalent UN number.

NA number Class Material Varies from UN Number? Notes NA 0027 4.1 Black powder for small arms No NA 0124 1.1D Jet perforating guns, charged oil well, with detonator No NA 0276 1.4C Model rocket motor No NA 0323 1.4S Model rocket motor No NA 0331 1.5D Ammonium nitrate-fuel oil (ANFO) mixture containing only prilled ammonium nitrate and fuel oil No NA 0337 1.4S Toy Caps No NA 0494 1.4D Jet perforating guns, charged oil well, with detonator No NA 1057 3 Lighters, non-pressurized, containing flammable liquid, Yes NA 1270 3 Petroleum oil No NA 1325 4.1 Fusee (railway or highway) Yes NA 1350 9 Sulfur No NA 1361 4.2 Charcoal briquettes, shell, screenings, wood, etc. No NA 1365 9 Cotton Yes NA 1556 6.1 Methyldichloroarsine Yes NA 1613 6.1 Hydrocyanic acid, aqueous solutions with less than 5 percent hydrogen cyanide No NA 1693 6.1 Tear gas devices with more than 2 percent tear gas substances, by mass Yes NA 1759 8 Ferrous chloride, solid Yes NA 1760 8 Chemical kit Yes 8 Compounds, cleaning liquid 8 Compounds, tree killing, liquid or Compounds, weed killing, liquid 8 Ferrous chloride, solution NA 1911 2.1 Diborane mixtures Yes NA 1954 2.1 Refrigerant gases, n.o.s. or Dispersant gases, n.o.s. Yes NA 1955 2.3 Organic phosphate, mixed with compressed gas or Organic phosphate compound, mixed with compressed gas or Organic phosphorus compound, mixed with compressed gas Yes NA 1961 2.1 Ethane-Propane mixture, refrigerated liquid No NA 1967 2.3 Parathion and compressed gas mixture Yes NA 1987 3 Denatured alcohol Yes NA 1993 Combustible liquid Combustible liquid, n.o.s. yes 3 Compounds, cleaning liquid 3 Compounds, tree killing, liquid or Compounds, weed killing, liquid 3 Diesel fuel 3 Fuel oil (No. 1, 2, 4, 5, or 6) NA 1999 3 Asphalt, at or above its flash point No NA 2212 9 Asbestos Yes NA 2448 9 Sulfur, molten No NA 2810 6.1 Compounds, tree killing, liquid or Compounds, weed killing, liquid Yes NA 2845 6.1 Ethyl phosphonous dichloride, anhydrous pyrophoric liquid Yes 6.1 Methyl phosphonous dichloride, pyrophoric liquid NA 2927 2.1 Ethyl phosphonothioic dichloride, anhydrous Yes 2.1 Ethyl phosphorodichloridate NA 3077 9 Hazardous waste, solid, n.o.s. Yes 9 Other regulated substances, solid, n.o.s NA 3082 9 Hazardous waste, liquid, n.o.s. No 9 Other regulated substances, liquid, n.o.s. NA 3178 4.1 Smokeless powder for small arms (100 pounds or less) No NA 3334 9 Self-defense spray, non-pressurized Yes NA 3356 9 Oxygen generator, chemical, spent Yes NA 9035 2.3 Gas identification set No NA 9191 5.1 Chlorine dioxide, hydrate, frozen No NA 9202 2.3 Carbon monoxide, refrigerated liquid (cryogenic liquid) No NA 9206 6.1 Methyl phosphonic dichloride No NA 9259 (9) Elevated temperature material, liquid, n.o.s. No No longer in use NA 9260 9 Aluminum, molten No NA 9263 6.1 Chloropivaloyl chloride No NA 9264 6.1 3,5-Dichloro-2,4,6-trifluoropyridine No NA 9269 6.1 Trimethoxysilane No NA 9279 2.1 Hydrogen absorbed in metal hydride No

See also List of UN numbers NA/UN exceptions - List of specific conflicts between NA numbers and UN numbers.

Notes

References