UN 1656Nicotine hydrochloride or Nicotine hydrochloride solution
Proper shipping name: Nicotine hydrochloride liquid or solution
Division 6.1
Toxic substances
Summary
UN 1656 is the UN number for nicotine hydrochloride or Nicotine hydrochloride solution. It is classed in Division 6.1 (toxic substances) of Class 6 for transport. Packing group II or III, depending on the form. Emergency responders use ERG guide 151.
Emergency response
The Emergency Response Guidebook (ERG2024) guide for this number:
- Guide151Nicotine hydrochloride, liquidNicotine hydrochloride, solution
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 1656
- Name
- Nicotine hydrochloride or Nicotine hydrochloride solution
- Hazard class
- Class 6: Toxic and infectious substances
- Division
- 6.1: Toxic substances
- Packing group
- II, III
- What the class covers
- Substances liable to cause death, serious injury or harm to health if swallowed, inhaled or absorbed through the skin.
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.
UN1656Nicotine hydrochloride liquid or solution
Special provisions: IB2
- Class
- 6.1
- Packing group
- II
- Labels
- 6.1
UN1656Nicotine hydrochloride liquid or solution
Special provisions: IB3
- Class
- 6.1
- Packing group
- III
- Labels
- 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 6
Class 6 covers poisons and infectious material. Division 6.1 is toxic substances that harm people if swallowed, inhaled or absorbed through the skin; 6.2 is infectious substances such as cultures and medical waste.
Check the official sources
For emergency response, packaging and quantity limits, use these:
- CAMEO Chemicals: UN/NA 1656NOAA 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