Division 4.2 covers which type of materials?

Division 4.2 covers which type of materials?

• A. Division 4.1
• B. Class 3
• C. Division 2.3
• D. Division 4.2

Answer: (D)

Division 4.2 is the category for spontaneously combustible materials—things that can ignite on their own after absorbing heat or being exposed to air, without an external flame or spark. That makes the option describing spontaneously combustible materials the correct match. The other options refer to different hazard groups: Division 4.1 covers flammable solids that ignite due to friction or heat, Class 3 covers flammable liquids, and Division 2.3 covers toxic gases that are hazardous to breathe. Knowing these distinctions helps you classify hazardous materials accurately in real-world handling and transport.

Division 4.2 is the category for spontaneously combustible materials—things that can ignite on their own after absorbing heat or being exposed to air, without an external flame or spark. That makes the option describing spontaneously combustible materials the correct match. The other options refer to different hazard groups: Division 4.1 covers flammable solids that ignite due to friction or heat, Class 3 covers flammable liquids, and Division 2.3 covers toxic gases that are hazardous to breathe. Knowing these distinctions helps you classify hazardous materials accurately in real-world handling and transport.