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3256

UN 3256Elevated temperature liquid, flammable, n.o.s., with flashpoint above 60° C, at or above its flashpoint

Class 3

Flammable liquids

Summary

UN 3256 is the UN number for elevated temperature liquid, flammable, n.o.s., with flashpoint above 60° C, at or above its flashpoint. It is classed in Class 3 (flammable liquids) for transport. Packing group III. Emergency responders use ERG guide 128.

Emergency response

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

  • Guide128Elevated temperature liquid, flammable, n.o.s., with flash point above 37.8°C (100°F), at or above its flash pointElevated temperature liquid, flammable, n.o.s., with flash point above 60°C (140°F), at or above its flash point

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 3256
Name
Elevated temperature liquid, flammable, n.o.s., with flashpoint above 60° C, at or above its flashpoint
Hazard class
Class 3: Flammable liquids
Packing group
III
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.

  • UN3256Elevated temperature liquid, flammable, n.o.s.

    with flash point above 37.8 C, at or above its flash point

    • Technical name required in parentheses

    Special provisions: IB1, T3, TP3, TP29

    Class
    3
    Packing group
    III
    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: