UN 3478Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing liquefied flammable gas
Division 2.1
Flammable gases
Summary
UN 3478 is the UN number for fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing liquefied flammable gas. 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:
- Guide115Fuel cell cartridges, containing liquefied flammable gasFuel cell cartridges contained in equipment, containing liquefied flammable gasFuel cell cartridges packed with equipment, containing liquefied flammable 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 3478
- Name
- Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing liquefied flammable gas
- 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
The entry for this number in 49 CFR 172.101.
UN3478Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment
containing liquefied flammable gas
Special provisions: 328
- Class
- 2.1
- Packing group
- None
- Labels
- 2.1
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.
Check the official sources
For emergency response, packaging and quantity limits, use these:
- CAMEO Chemicals: UN/NA 3478NOAA datasheets with the ERG response guide and isolation distances
- Emergency Response Guidebook (ERG)PHMSA's guide for first responders, free as a PDF or app
- 49 CFR 172.101 Hazardous Materials TableThe legal U.S. entry: proper shipping name, packing group, labels and special provisions