UN 3510Adsorbed gas, flammable, n.o.s
Division 2.1
Flammable gases
Summary
UN 3510 is the UN number for adsorbed gas, flammable, n.o.s. It is classed in Division 2.1 (flammable gases) of Class 2 for transport. Emergency responders use ERG guide 174.
Emergency response
The Emergency Response Guidebook (ERG2024) guide for this number:
- Guide174Adsorbed gas, flammable, n.o.s.
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 3510
- Name
- Adsorbed gas, flammable, n.o.s
- 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.
UN3510Adsorbed gas, flammable, n.o.s
- Technical name required in parentheses
- 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 3510NOAA 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