UNunnums
1999

UN 1999Tars, liquid including road asphalt and oils, bitumen and cut backs

Class 3

Flammable liquids

Summary

UN 1999 is the UN number for tars, liquid including road asphalt and oils, bitumen and cut backs. It is classed in Class 3 (flammable liquids) for transport. Packing group II or III, depending on the form. Emergency responders use ERG guide 130.

Emergency response

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

  • Guide130AsphaltAsphalt, cut backTars, liquid

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 1999
Name
Tars, liquid including road asphalt and oils, bitumen and cut backs
Hazard class
Class 3: Flammable liquids
Packing group
II, III
What the class covers
Flammable liquids (and, in the U.S., combustible liquids).

U.S. Hazardous Materials Table

3 entries share this number in 49 CFR 172.101, by name, packing group or where the shipment is going.

  • UN1999Tars, liquid

    including road oils and cutback bitumens

    Special provisions: 149, B13, IB2, T3, TP3, TP29

    Class
    3
    Packing group
    II
    Labels
    3

  • UN1999Tars, liquid

    including road oils and cutback bitumens

    Special provisions: B1, B13, IB3, T1, TP3

    Class
    3
    Packing group
    III
    Labels
    3

  • NA1999Asphalt

    at or above its flash point

    • U.S. domestic shipments only

    Special provisions: IB3, T1, TP3

    Class
    3
    Packing group
    III
    Labels
    3

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 3

Class 3 covers flammable liquids such as gasoline, diesel, solvents, paints and alcohols. In the United States, some liquids with higher flash points can also be shipped as combustible liquids under the same class.

See all Class 3 UN numbers

Check the official sources

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