UN 1941Dibromodifluoromethane, R12B2
Class 9
Miscellaneous dangerous goods
Summary
UN 1941 is the UN number for dibromodifluoromethane, R12B2. It is classed in Class 9 (miscellaneous dangerous goods) for transport. Packing group III. Emergency responders use ERG guide 171.
Emergency response
The Emergency Response Guidebook (ERG2024) guide for this number:
- Guide171DibromodifluoromethaneRefrigerant gas R-12B2
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 1941
- Name
- Dibromodifluoromethane, R12B2
- Hazard class
- Class 9: Miscellaneous dangerous goods
- Packing group
- III
- What the class covers
- Substances and articles which present a hazard during transport not covered by other classes, such as lithium batteries and environmentally hazardous substances.
U.S. Hazardous Materials Table
The entry for this number in 49 CFR 172.101.
UN1941Dibromodifluoromethane
, R12B2
- Regulated only when shipped by air
Special provisions: T11, TP2
- Class
- 9
- Packing group
- III
- Labels
- None
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 9
Class 9 covers dangerous goods that don't fit any other class, including lithium batteries, dry ice, environmentally hazardous substances, elevated-temperature materials and magnetized material.
Check the official sources
For emergency response, packaging and quantity limits, use these:
- CAMEO Chemicals: UN/NA 1941NOAA datasheets with the ERG response guide and isolation distances
- Emergency Response Guidebook (ERG)PHMSA's guide for first responders, free as a PDF or app
- 49 CFR 172.101 Hazardous Materials TableThe legal U.S. entry: proper shipping name, packing group, labels and special provisions