UNunnums
1613

UN 1613Hydrocyanic acid, aqueous solutions or Hydrogen cyanide, aqueous solutions with not more than 20 percent hydrogen cyanide or Hydrocyanic acid, aqueous solutions with less than 5 percent hydrogen cyanide

Division 6.1

Toxic substances

Summary

UN 1613 is the UN number for hydrocyanic acid, aqueous solutions or Hydrogen cyanide, aqueous solutions with not more than 20 percent hydrogen cyanide or Hydrocyanic acid, aqueous solutions with less than 5 percent hydrogen cyanide. It is classed in Division 6.1 (toxic substances) of Class 6 for transport. Packing group I. Emergency responders use ERG guide 154.

Emergency response

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

  • Guide154Hydrocyanic acid, aqueous solution, with less than 5% hydrogen cyanideHydrocyanic acid, aqueous solution, with not more than 20% hydrogen cyanideHydrogen cyanide, aqueous solution, with not more than 20% hydrogen cyanideHighlighted 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 1613
Name
Hydrocyanic acid, aqueous solutions or Hydrogen cyanide, aqueous solutions with not more than 20 percent hydrogen cyanide or Hydrocyanic acid, aqueous solutions with less than 5 percent hydrogen cyanide
Hazard class
Class 6: Toxic and infectious substances
Division
6.1: Toxic substances
Packing group
I
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.

  • UN1613Hydrocyanic acid, aqueous solutions or Hydrogen cyanide, aqueous solutions

    with not more than 20 percent hydrogen cyanide

    Special provisions: 2, B61, B65, B77, B82, T20, TP2, TP13

    Class
    6.1
    Packing group
    I
    Labels
    6.1

  • NA1613Hydrocyanic acid, aqueous solutions

    with less than 5 percent hydrogen cyanide

    • U.S. domestic shipments only

    Special provisions: IB1, T14, TP2, TP13, TP27

    Class
    6.1
    Packing group
    II
    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.

See all Class 6 UN numbers

Check the official sources

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