UNunnums
2978

UN 2978Uranium hexafluoride, fissile excepted or non-fissile

Proper shipping name: Radioactive material, uranium hexafluoride

Class 7

Radioactive material

Summary

UN 2978 is the UN number for uranium hexafluoride, fissile excepted or non-fissile. It is classed in Class 7 (radioactive material) for transport. Emergency responders use ERG guide 166.

Emergency response

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

  • Guide166Radioactive material, uranium hexafluoride, non fissile or fissile-exceptedUranium hexafluoride, radioactive material, non fissile or fissile-exceptedHighlighted 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 2978
Name
Uranium hexafluoride, fissile excepted or non-fissile
Hazard class
Class 7: Radioactive material
What the class covers
Material containing radionuclides above set activity limits.

U.S. Hazardous Materials Table

The entry for this number in 49 CFR 172.101.

  • UN2978Radioactive material, uranium hexafluoride

    non fissile or fissile-excepted

    Class
    7
    Packing group
    None
    Labels
    7, 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 7

Class 7 covers radioactive material, from medical isotopes to nuclear fuel. Packages are labelled by radiation level at the surface and the type of packaging used.

See all Class 7 UN numbers

Check the official sources

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