UNunnums
2790

UN 2790Acetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass or Acetic acid solution, with more than 10 percent and less than 50 percent acid, by mass

Class 8

Corrosives

Summary

UN 2790 is the UN number for acetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass or Acetic acid solution, with more than 10 percent and less than 50 percent acid, by mass. It is classed in Class 8 (corrosives) for transport. Packing group II or III, depending on the form. Emergency responders use ERG guide 153.

Emergency response

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

  • Guide153Acetic acid, solution, more than 10% but not 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 2790
Name
Acetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass or Acetic acid solution, with more than 10 percent and less than 50 percent acid, by mass
Hazard class
Class 8: Corrosives
Packing group
II, III
What the class covers
Substances which can damage living tissue or other goods and materials on contact.

U.S. Hazardous Materials Table

2 entries share this number in 49 CFR 172.101, by name, packing group or where the shipment is going.

  • UN2790Acetic acid solution

    not less than 50 percent but not more than 80 percent acid, by mass

    Special provisions: 148, A3, A7, A10, B2, IB2, T7, TP2

    Class
    8
    Packing group
    II
    Labels
    8

  • UN2790Acetic acid solution

    with more than 10 percent and less than 50 percent acid, by mass

    Special provisions: 148, IB3, T4, TP1

    Class
    8
    Packing group
    III
    Labels
    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 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: