Hazard classes

Class 1 - Explosives

Division 1.1

Articles and substances having a mass explosion hazard

Division 1.2

Articles and substances having a projection hazard, but not a mass explosion hazard

Division 1.3

Articles and substances having a fire hazard, a minor blast hazard, and/or a minor projection hazard, but not a mass explosion hazard

Division 1.4

Articles and substances presenting no significant hazard (explosion limited to package)

Division 1.5

Very insensitive substances having a mass explosion hazard

Division 1.6

Extremely insensitive articles which do not have a mass explosion hazard

Class 2 - Gas

Division 2.1

Flammable Gas

Division 2.2

Non-flammable, non-toxic gas (under pressure, inert, etc.)

Division 2.3

Toxic Gas

Class 3 - Flammable Liquids

100 Degrees F or less open cup

Class 4 - Other Flammable Substance

Division 4.1

Flammable Solid

Division 4.2

Substances liable to spontaneous combustion

Division 4.3

Substances which, in contact with water, emit flammable gases

Class 5 - Oxidizing Substances and Organic Peroxides

Division 5.1

Oxidizers

Division 5.2

Organic Peroxides

Class 6 Toxic (Poisonous) and Infectious Substances

Division 6.1

Toxic Substances

Division 6.2

Infectious Substances