UNunnums
1372

UN 1372Fibers, animal or Fibers, vegetable

Division 4.2

Spontaneously combustible

Summary

UN 1372 is the UN number for fibers, animal or Fibers, vegetable. It is classed in Division 4.2 (spontaneously combustible) of Class 4 for transport. Packing group III. Emergency responders use ERG guide 133.

Emergency response

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

  • Guide133Fibers, animal or vegetable, burnt, wet or dampFibres, animal or vegetable, burnt, wet or damp

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 1372
Name
Fibers, animal or Fibers, vegetable
Hazard class
Class 4: Flammable solids
Division
4.2: Spontaneously combustible
Packing group
III
What the class covers
Substances liable to spontaneous combustion.

U.S. Hazardous Materials Table

The entry for this number in 49 CFR 172.101.

  • UN1372Fibers, animal or Fibers, vegetable

    burnt, wet or damp

    • Regulated only when shipped by air
    • International shipments
    • Regulated only when shipped by water
    Class
    4.2
    Packing group
    III
    Labels
    4.2

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 4

Class 4 covers flammable solids and other substances that can catch fire. Division 4.1 is flammable solids and self-reactive substances, 4.2 is substances that can spontaneously combust in air, and 4.3 is substances that give off flammable gas when wet.

See all Class 4 UN numbers

Check the official sources

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