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HomeUN NumbersClass 2.2UN2201
Hazard Class 2.2

UN Number

UN2201

Nitrous oxide, refrigerated liquid

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

One row in 49 CFR 172.101 for UN2201.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
—Nitrous oxide, refrigerated liquid2.2—2.2, 5.1B6, T75, TP5, TP22None304314, 315ForbiddenForbiddenD40
  • 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 2.2 — Non-Flammable, Non-Poisonous Gas

See the full class list

A non-flammable, nonpoisonous compressed gas (Division 2.2) exerts a gauge pressure of 200 kPa (29.0 psig) or greater at 20°C (68°F), is a liquefied gas or a cryogenic liquid, and does not meet the definition of Division 2.1 or 2.3.

Source: 49 CFR 173.115 (eCFR).

Previous / next UN number

UN2200Propadiene, stabilizedUN2202Hydrogen selenide, anhydrous

Nearby Class 2.2 UN Numbers

UN2037Gas cartridges, (flammable) without a release device, non-refillableUN2073Ammonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 35 percent but not more than 50 percent ammoniaUN2187Carbon dioxide, refrigerated liquidUN2193Hexafluoroethane, or Refrigerant gas R 116UN2422Octafluorobut-2-ene or Refrigerant gas R 1318UN2424Octafluoropropane or Refrigerant gas R 218UN2451Nitrogen trifluorideUN2591Xenon, refrigerated liquid (cryogenic liquids)
View the full Class 2.2 list →

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