UNunnums
3540

UN 3540Articles containing flammable liquid, n.o.s.

Class 3

Flammable liquids

Summary

UN 3540 is the UN number for articles containing flammable liquid, n.o.s. It is classed in Class 3 (flammable liquids) for transport. Emergency responders use ERG guide 127.

Emergency response

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

  • Guide127Articles containing flammable liquid, 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 3540
Name
Articles containing flammable liquid, n.o.s.
Hazard class
Class 3: Flammable liquids
What the class covers
Flammable liquids (and, in the U.S., combustible liquids).

U.S. Hazardous Materials Table

The entry for this number in 49 CFR 172.101.

  • UN3540Articles containing flammable liquid, n.o.s.

    • Technical name required in parentheses

    Special provisions: 391

    Class
    3
    Packing group
    None
    Labels
    3

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 3

Class 3 covers flammable liquids such as gasoline, diesel, solvents, paints and alcohols. In the United States, some liquids with higher flash points can also be shipped as combustible liquids under the same class.

See all Class 3 UN numbers

Check the official sources

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