HazMat Tool — substance information Reference only — not a shipping paper, placard mandate, or CVI record.

Fibers, animal or Fibers, vegetable burnt, wet or damp

HMT 15 June 2026
Reference only — HMT snapshot for inspection and audit support; not a shipping paper, placard mandate, or CVI record. Use Print / PDF below for field notes.
UN / ID
UN 1372
Hazard class
4.2
Packing group
III
ERG guide
ERG 133
Special provisions
—
Source
49 CFR §172 (15 June 2026)

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Fibers, animal or Fibers, vegetable burnt, wet or damp


Fiber (spelled fibre in British English; from Latin: fibra) is a natural or artificial substance that is significantly longer than it is wide. Fibers are often used in the manufacture of other materials. The strongest engineering materials often incorporate fibers, for example carbon fiber and ultra-high-molecular-weight polyethylene. Synthetic fibers can often be produced very cheaply and in large amounts compared to natural fibers, but for clothing natural fibers have some benefits, such as comfort, over their synthetic counterparts Wikipedia

Emergency Response Guide No. 133

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard class

4.2
Spontaneously combustible materials

(4) Identification number Help

UN 1372

(5) Packing Group Help

III

(6) Labels Help

Spontaneously combustible materials (4.2)

(1) Symbols Help


This entry is signed with "A". The letter "A" denotes a material that is subject to the requirements of this subchapter only when offered or intended for transportation by aircraft, unless the material is a hazardous substance or a hazardous waste. A shipping description entry preceded by an "A" may be used to describe a material for other modes of transportation provided all applicable requirements for the entry are met.
This entry is signed with "I". The letter "I" identifies proper shipping names which are appropriate for describing materials in international transportation. An alternate proper shipping name may be selected when only domestic transportation is involved.
This entry is signed with "W". The letter "W" denotes a material that is subject to the requirements of this subchapter only when offered or intended for transportation by vessel, unless the material is a hazardous substance or a hazardous waste. A shipping description entry preceded by a "W" may be used to describe a material for other modes of transportation provided all applicable requirements for the entry are met.

(7) Special Provisions (§172.102) Help

(8) Packing Authorizations (§173.***) Help

(8A) Exceptions151see 49 CFR §173.151
(8B) Non-bulk213see 49 CFR §173.213
(8C) Bulk240see 49 CFR §173.240

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft onlyForbidden

(10) Vessel stowage Help

(10A) Location
(10B) Other—

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

Prohibited Must not be loaded, transported, or stored together in the same vehicle or facility.
Permitted May be loaded, transported, or stored together.
Restricted May be loaded, transported, or stored together only with restrictions.