Division 5.2 refers to which type of material?

Division 5.2 refers to which type of material?

• A. Gas that expands rapidly.
• B. Organic peroxide / any organic compound containing oxygen in the bivalent structure.
• C. Inert solid.
• D. Explosive material.

Answer: (B)

Division 5.2 is the category for organic peroxides. These are organic compounds that contain a peroxide group, specifically an O–O linkage, within their structure. That peroxide bond makes them unusually unstable and capable of rapid, exothermic decomposition when exposed to heat, shock, friction, or contaminants. Because of this tendency to decompose violently and sometimes explode or release oxygen to intensify a fire, organic peroxides require strict handling and segregation from heat sources, fuels, acids, bases, and other reactive materials. The description “organic peroxide / any organic compound containing oxygen in a bivalent structure” directly captures what Division 5.2 refers to, which is why it’s the best answer.

Division 5.2 is the category for organic peroxides. These are organic compounds that contain a peroxide group, specifically an O–O linkage, within their structure. That peroxide bond makes them unusually unstable and capable of rapid, exothermic decomposition when exposed to heat, shock, friction, or contaminants. Because of this tendency to decompose violently and sometimes explode or release oxygen to intensify a fire, organic peroxides require strict handling and segregation from heat sources, fuels, acids, bases, and other reactive materials. The description “organic peroxide / any organic compound containing oxygen in a bivalent structure” directly captures what Division 5.2 refers to, which is why it’s the best answer.