UNunnums
2789

UN 2789Acetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by mass

Class 8

Corrosives

Summary

UN 2789 is the UN number for acetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by mass. It is classed in Class 8 (corrosives) for transport. Packing group II. Emergency responders use ERG guide 132.

Emergency response

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

  • Guide132Acetic acid, glacialAcetic acid, solution, more than 80% acid

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 2789
Name
Acetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by mass
Hazard class
Class 8: Corrosives
Packing group
II
What the class covers
Substances which can damage living tissue or other goods and materials on contact.

U.S. Hazardous Materials Table

The entry for this number in 49 CFR 172.101.

  • UN2789Acetic acid, glacial or Acetic acid solution

    with more than 80 percent acid, by mass

    Special provisions: A3, A7, A10, B2, IB2, T7, TP2

    Class
    8
    Packing group
    II
    Labels
    8, 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 8

Class 8 covers corrosive substances such as acids, alkalis and battery fluid, which can destroy skin or corrode metal on contact.

See all Class 8 UN numbers

Check the official sources

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