Hazard Class 3 – Flammable liquids
Hazard Class 3 – Flammable liquids
Flammable liquids are:
Combustible liquids are a liquid that does not meet the definition of any other hazard class and has a flash point of > 60.5° C (141° F) and = 93° C (200° F).
The following are exceptions to the Class 3 definition:
When offered for ground transport, a flammable liquid with a flash point = 38° C (100° F) that does not meet the definition of any other hazard class may be reclassified as a combustible liquid. This means that non-bulk packages will be exempt from regulation when offered by ground.
- A liquid having a flash point of = 60.5° C (141° F)
- Any material in a liquid phase with a flash point = 37.8° C (100° F) that is intentionally heated and offered for transport or transported at or above its flash point in bulk packaging.
Combustible liquids are a liquid that does not meet the definition of any other hazard class and has a flash point of > 60.5° C (141° F) and = 93° C (200° F).
The following are exceptions to the Class 3 definition:
- Liquids meeting the definition of Class 2 gases
- Mixtures in which 99% of the contents have a flash point of = 60.5° C (141° F) that are not transported at or above flash point
- Liquids with a flash point > 35° C (95° F) that do not sustain combustion according to ASTM 4206
- Liquids with a flash point > 35° C and a fire point > 100° C according to ISO 2592
- Liquids with a flash point > 35° C that are in a water miscible solution with a water content > 90% by mass.
When offered for ground transport, a flammable liquid with a flash point = 38° C (100° F) that does not meet the definition of any other hazard class may be reclassified as a combustible liquid. This means that non-bulk packages will be exempt from regulation when offered by ground.
Source: 49 CFR §173.120
