UNunnums
2037

UN 2037Gas cartridges (flammable) without a release device, non-refillable or Receptacles, small, containing gas (gas cartridges) flammable or nonflammable, without release device, not refillable and not exceeding 1 L capacity

Division 2.1

Flammable gases

Summary

UN 2037 is the UN number for gas cartridges (flammable) without a release device, non-refillable or Receptacles, small, containing gas (gas cartridges) flammable or nonflammable, without release device, not refillable and not exceeding 1 L capacity. It is classed in Division 2.1 (flammable gases) of Class 2 for transport. Emergency responders use ERG guide 115.

Emergency response

The Emergency Response Guidebook (ERG2024) guide for this number:

  • Guide115Gas cartridgesReceptacles, small, containing gas

From the 2024 Emergency Response Guidebook (ERG2024), published by U.S. Department of Transportation, PHMSA. Read the full guide in the ERG or on CAMEO Chemicals.

Identification

UN number
UN 2037
Name
Gas cartridges (flammable) without a release device, non-refillable or Receptacles, small, containing gas (gas cartridges) flammable or nonflammable, without release device, not refillable and not exceeding 1 L capacity
Hazard class
Class 2: Gases
Division
2.1: Flammable gases
What the class covers
Gases which ignite on contact with an ignition source.

U.S. Hazardous Materials Table

4 entries share this number in 49 CFR 172.101, by name, packing group or where the shipment is going.

  • UN2037Gas cartridges

    (flammable) without a release device, non-refillable

    Class
    2.1
    Packing group
    None
    Labels
    2.1

  • UN2037Receptacles, small, containing gas or gas cartridges

    (flammable) without release device, not refillable and not exceeding 1 L capacity

    Class
    2.1
    Packing group
    None
    Labels
    2.1

  • UN2037Receptacles, small, containing gas or gas

    cartridges (non-flammable) without release device, not refillable and not exceeding 1 L capacity

    Class
    2.2
    Packing group
    None
    Labels
    2.2

  • UN2037Receptacles, small, containing gas or gas cartridges

    (oxidizing), without release device, not refillable and not exceeding 1 L capacity

    Special provisions: A14

    Class
    2.2
    Packing group
    None
    Labels
    2.2, 5.1

From the eCFR edition of 49 CFR 172.101 dated 2026-10-05 (section last amended 2026-09-08). The eCFR is an editorial compilation, not the official legal edition. Read the current table.

About Class 2

Class 2 covers gases, whether compressed, liquefied, dissolved under pressure or refrigerated. Division 2.1 is flammable gases such as propane, 2.2 is non-flammable, non-toxic gases such as nitrogen, and 2.3 is toxic gases such as chlorine.

See all Class 2 UN numbers

Check the official sources

For emergency response, packaging and quantity limits, use these: