Class 5
Organic peroxides are classified under DOT Hazard Class 5.2 and oxidizers are classified under Hazard Class 5.1. Organic peroxides are substances that can release oxygen and initiate combustion, while oxidizers are substances that can react exothermically with other materials, often accelerating combustion.
Physical
Oxygen is classified as a Class 3 oxidizer. Class 4 oxidizers are less reactive than Class 3 oxidizers like oxygen.
Peroxides are oxidizers.
Division 5.1 contains oxidizers.
In terms of chemical class, acetone is a ketone and, more broadly, an organic chemical. In terms of hazard classification, acetone is a Class 3 Flammable Liquid
Hazard Class 3
Class 1 materials are explosives.Materials that have an explosive hazard are in Hazard Class 1.
DOT class 8 are corrosive.
Hazard Class 2 is for compressed gases and poisonous gases.
Corrosive materials are in Hazard Class 8.
Hazard class 4 is Flammable Solids.