UNunnums
1746

UN 1746Bromine trifluoride

Division 5.1

Oxidizing substances

Summary

UN 1746 is the UN number for bromine trifluoride. It is classed in Division 5.1 (oxidizing substances) of Class 5 for transport. Packing group I. Emergency responders use ERG guide 144.

Emergency response

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

  • Guide144Bromine trifluorideHighlighted in green: see Table 1

Highlighted in green in the ERG. If there is no fire, go to ERG Table 1 for initial isolation and protective action distances, and also use the guide. If a fire is involved, use the guide's evacuation distances and protect downwind according to Table 1.

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 1746
Name
Bromine trifluoride
Hazard class
Class 5: Oxidizers and organic peroxides
Division
5.1: Oxidizing substances
Packing group
I
What the class covers
Substances which may cause or contribute to the combustion of other material, generally by yielding oxygen.

U.S. Hazardous Materials Table

The entry for this number in 49 CFR 172.101.

  • UN1746Bromine trifluoride

    • Name, class and packing group fixed by regulation

    Special provisions: 2, B9, B14, B32, T22, TP2, TP13, TP38, TP45

    Class
    5.1
    Packing group
    I
    Labels
    5.1, 6.1, 8

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 5

Class 5 covers substances that supply oxygen or otherwise intensify a fire. Division 5.1 is oxidizers such as ammonium nitrate and hydrogen peroxide; 5.2 is organic peroxides, which may also be thermally unstable.

See all Class 5 UN numbers

Check the official sources

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