UNunnums
2809

UN 2809Mercury or Mercury contained in manufactured articles

Class 8

Corrosives

Summary

UN 2809 is the UN number for mercury or Mercury contained in manufactured articles. It is classed in Class 8 (corrosives) for transport. Packing group III. Emergency responders use ERG guide 172.

Emergency response

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

  • Guide172Mercury

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 2809
Name
Mercury or Mercury contained in manufactured articles
Hazard class
Class 8: Corrosives
Packing group
III
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.

  • UN2809Mercury

    • Regulated only when shipped by air
    • Regulated only when shipped by water

    Special provisions: 365

    Class
    8
    Packing group
    III
    Labels
    8, 6.1

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 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: