Hazard Class 2.1
A flammable gas (Division 2.1) is any material which is a gas at 20°C (68°F) or less and 101.3 kPa (14.7 psia) of pressure that is ignitable at 13 percent or less by volume with air, or has a flammable range with air of at least 12 percent regardless of the lower limit.
Source: 49 CFR 173.115 (eCFR).
| UN Number | Proper Shipping Name | Packing Group |
|---|---|---|
| UN1001 | Acetylene, dissolved | — |
| UN1010 | Butadienes, stabilized or Butadienes and Hydrocarbon mixture, stabilized containing more than 40% butadienes | — |
| UN1011 | Butane see also Petroleum gases, liquefied | — |
| UN1012 | Butylene see also Petroleum gases, liquefied | — |
| UN1027 | Cyclopropane | — |
| UN1030 | 1,1-Difluoroethane or Refrigerant gas R 152a | — |
| UN1032 | Dimethylamine, anhydrous | — |
| UN1033 | Dimethyl ether | — |
| UN1035 | Ethane | — |
| UN1036 | Ethylamine | — |
| UN1037 | Ethyl chloride | — |
| UN1038 | Ethylene, refrigerated liquid (cryogenic liquid) | — |
| UN1039 | Ethyl methyl ether | — |
| UN1041 | Ethylene oxide and carbon dioxide mixtures with more than 9 percent but not more than 87 percent ethylene oxide | — |
| UN1049 | Hydrogen, compressed | — |
| UN1055 | Isobutylene see also Petroleum gases, liquefied | — |
| UN1057 | Lighters containing flammable gas | — |
| UN1060 | Methyl acetylene and propadiene mixtures, stabilized | — |
| UN1061 | Methylamine, anhydrous | — |
| UN1063 | Methyl chloride or Refrigerant gas R 40 | — |
| UN1075 | Petroleum gases, liquefied or Liquefied petroleum gas | — |
| UN1077 | Propylene see also Petroleum gases, liquefied | — |
| UN1081 | Tetrafluoroethylene, stabilized | — |
| UN1083 | Trimethylamine, anhydrous | — |
| UN1085 | Vinyl bromide, stabilized | — |
| UN1086 | Vinyl chloride, stabilized | — |
| UN1087 | Vinyl methyl ether, stabilized | — |
| UN1860 | Vinyl fluoride, stabilized | — |
| UN1912 | Methyl chloride and methylene chloride mixtures | — |
| UN1950 | Aerosols, corrosive, Packing Group II or III, (each not exceeding 1 L capacity) | — |
| UN1954 | Compressed gas, flammable, n.o.s. | — |
| UN1957 | Deuterium, compressed | — |
| UN1959 | 1,1-Difluoroethylene or Refrigerant gas R 1132a | — |
| UN1961 | Ethane, refrigerated liquid | — |
| UN1962 | Ethylene | — |
| UN1964 | Hydrocarbon gas mixture, compressed, n.o.s. | — |
| UN1965 | Hydrocarbon gas mixture, liquefied, n.o.s. | — |
| UN1966 | Hydrogen, refrigerated liquid (cryogenic liquid) | — |
| UN1969 | Isobutane see also Petroleum gases, liquefied | — |
| UN1971 | Methane, compressed or Natural gas, compressed (with high methane content) | — |
| UN1972 | Methane, refrigerated liquid (cryogenic liquid) or Natural gas, refrigerated liquid (cryogenic liquid, with high methane content) | — |
| UN1978 | Propane, see also Petroleum gases, liquefied | — |
| UN2034 | Hydrogen and Methane mixtures, compressed | — |
| UN2035 | 1,1,1-Trifluoroethane or Refrigerant gas, R 143a | — |
| UN2037 | Gas cartridges, (flammable) without a release device, non-refillable | — |
| UN2044 | 2,2-Dimethylpropane | — |
| UN2200 | Propadiene, stabilized | — |
| UN2203 | Silane | — |
| UN2419 | Bromotrifluoroethylene | — |
| UN2452 | Ethylacetylene, stabilized | — |
| UN2453 | Ethyl fluoride or Refrigerant gas R161 | — |
| UN2454 | Methyl fluoride, or Refrigerant gas R 41 | — |
| UN2517 | 1-Chloro-1,1-difluoroethane or Refrigerant gas R 142b | — |
| UN2601 | Cyclobutane | — |
| UN3138 | Ethylene, acetylene and propylene in mixture, refrigerated liquid with at least 71.5 percent ethylene with not more than 22.5 percent acetylene and not more than 6 percent propylene | — |
| UN3150 | Devices, small, hydrocarbon gas powered or Hydrocarbon gas refills for small devices with release device | — |
| UN3153 | Perfluoro(methyl vinyl ether) | — |
| UN3154 | Perfluoro(ethyl vinyl ether) | — |
| UN3161 | Liquefied gas, flammable, n.o.s. | — |
| UN3167 | Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid | — |
| UN3252 | Difluoromethane or Refrigerant gas R 32 | — |
| UN3312 | Gas, refrigerated liquid, flammable, n.o.s. (cryogenic liquid) | — |
| UN3354 | Insecticide gases, flammable, n.o.s. | — |
| UN3358 | Refrigerating machines, containing flammable, non-toxic, liquefied gas | — |
| UN3468 | Hydrogen in a metal hydride storage system or Hydrogen in a metal hydride storage system contained in equipment or Hydrogen in a metal hydride storage system packed with equipment | — |
| UN3478 | Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing liquefied flammable gas | — |
| UN3479 | Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing hydrogen in metal hydride | — |
| UN3501 | Chemical under pressure, flammable, n.o.s | — |
| UN3504 | Chemical under pressure, flammable, toxic, n.o.s | — |
| UN3505 | Chemical under pressure, flammable, corrosive, n.o.s | — |
| UN3510 | Adsorbed gas, flammable, n.o.s | — |
| UN3529 | Engine, internal combustion, flammable gas powered or Engine, fuel cell, flammable gas powered or Machinery, internal combustion, flammable gas powered or Machinery, fuel cell, flammable gas powered | — |
| UN3537 | Articles containing flammable gas, n.o.s. | — |
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