Which hazard class does NOT have divisions?

Class 3, which pertains to flammable liquids, is indeed correct as the hazard class that does not have divisions. In hazardous materials classification, classes are the broad categories of hazards based on the properties of the materials. However, some classes are further divided into subdivisions to specify the types of hazards more clearly.

While Class 1 (explosives) has divisions based on the nature of the explosive hazard (such as mass explosion, projection hazard, etc.), and Class 2 (gases) includes divisions such as flammable gases, non-flammable gases, and toxic gases, Class 5 (oxidizers and organic peroxides) is similarly divided into two divisions.

In contrast, Class 3 does not have any divisions. This means that all flammable liquids are treated under the same classification without further subdivision, making it unique compared to the other classes listed. This is an important distinction for those involved in the transportation and handling of hazardous materials, as it affects how these materials are labeled, packaged, and managed.