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HomeUN NumbersClass 2.1UN3504
Hazard Class 2.1

UN Number

UN3504

Chemical under pressure, flammable, toxic, n.o.s

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

One row in 49 CFR 172.101 for UN3504.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
GChemical under pressure, flammable, toxic, n.o.s2.1—2.1, 6.1362, T50, TP40None335313, 315Forbidden75 kgD40
  • Sym.: Column 1 symbols, 49 CFR 172.101(b).
  • Description: Column 2, the proper shipping name, 172.101(c).
  • Class: Column 3, hazard class or division, 172.101(d).
  • PG: Column 5, packing group, 172.101(f).
  • Labels: Column 6, label codes, 172.101(g).
  • Special provisions: Column 7, codes explained in 49 CFR 172.102, 172.101(h).
  • 8A / 8B / 8C: Packaging exceptions, non-bulk and bulk sections of 49 CFR part 173 (an entry of 202 means 173.202), 172.101(i).
  • 9A / 9B: Maximum quantity per package on passenger aircraft or rail, and on cargo aircraft only, 172.101(j).
  • 10A / 10B: Vessel stowage location and other stowage and handling codes, 172.101(k).

Division 2.1 — Flammable Gas

See the full class list

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).

Previous / next UN number

UN3503Chemical under pressure, corrosive, n.o.sUN3505Chemical under pressure, flammable, corrosive, n.o.s

Nearby Class 2.1 UN Numbers

UN3468Hydrogen 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 equipmentUN3478Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing liquefied flammable gasUN3479Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing hydrogen in metal hydrideUN3501Chemical under pressure, flammable, n.o.sUN3510Adsorbed gas, flammable, n.o.sUN3529Engine, 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 poweredUN3537Articles containing flammable gas, n.o.s.
View the full Class 2.1 list →

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