UNunnums
2206

UN 2206Isocyanates, toxic, n.o.s. or Isocyanate solutions, toxic, n.o.s. flashpoint more than 61° C and boiling point less than 300° C

Division 6.1

Toxic substances

Summary

UN 2206 is the UN number for isocyanates, toxic, n.o.s. or Isocyanate solutions, toxic, n.o.s. flashpoint more than 61° C and boiling point less than 300° C. 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 156.

Emergency response

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

  • Guide156Isocyanate solution, poisonous, n.o.s.Isocyanate solution, toxic, n.o.s.Isocyanates, poisonous, n.o.s.Isocyanates, toxic, n.o.s.

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 2206
Name
Isocyanates, toxic, n.o.s. or Isocyanate solutions, toxic, n.o.s. flashpoint more than 61° C and boiling point less than 300° C
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.

  • UN2206Isocyanates, toxic, n.o.s. or Isocyanate solutions, toxic, n.o.s.

    flash point more than 61 degrees C and boiling point less than 300 degrees C

    • Technical name required in parentheses

    Special provisions: IB2, T11, TP2, TP13, TP27

    Class
    6.1
    Packing group
    II
    Labels
    6.1

  • UN2206Isocyanates, toxic, n.o.s. or Isocyanate solutions, toxic, n.o.s.

    flash point more than 61 degrees C and boiling point less than 300 degrees C

    • Technical name required in parentheses

    Special provisions: IB3, T7, TP1, TP13, TP28

    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.

See all Class 6 UN numbers

Check the official sources

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