UNunnums
1339

UN 1339Phosphorus heptasulfide, free from yellow or white phosphorus

Division 4.1

Flammable solids

Summary

UN 1339 is the UN number for phosphorus heptasulfide, free from yellow or white phosphorus. It is classed in Division 4.1 (flammable solids) of Class 4 for transport. Packing group II. Emergency responders use ERG guide 139.

Emergency response

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

  • Guide139Phosphorus heptasulfide, free from yellow and white phosphorusPhosphorus heptasulphide, free from yellow and white phosphorus

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 1339
Name
Phosphorus heptasulfide, free from yellow or white phosphorus
Hazard class
Class 4: Flammable solids
Division
4.1: Flammable solids
Packing group
II
What the class covers
Flammable solids, self-reactive substances and solid desensitized explosives.

U.S. Hazardous Materials Table

The entry for this number in 49 CFR 172.101.

  • UN1339Phosphorus heptasulfide

    free from yellow or white phosphorus

    Special provisions: A20, IB4, N34, T3, TP33, W31

    Class
    4.1
    Packing group
    II
    Labels
    4.1

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 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: