ICC Commercial Building Inspector Practice Test

Class II organic peroxides are characterized by which property?

1. They emit toxic fumes

2. They burn very rapidly

3. They are non-combustible

4. They are explosive under pressure

The correct answer is: They burn very rapidly

Class II organic peroxides are known for their ability to burn very rapidly. This characteristic is significant when considering their handling and storage, as it presents a substantial fire hazard. Organic peroxides are a group of compounds that contain a peroxide functional group, and those classified as Class II have a certain level of reactivity that can lead to quick ignition and spread of flames under the right conditions. The rapid burning capacity of Class II organic peroxides can be attributed to their chemical structure and the release of energy during combustion. Understanding this property is crucial for fire safety and risk management in commercial buildings where such materials might be used or stored. While the other provided options identify conditions that can pertain to different hazardous materials, they do not accurately represent the defining characteristic of Class II organic peroxides. For instance, some peroxides may indeed release toxic fumes or have explosive potential, but these are not characteristics that universally define Class II organic peroxides. Their recognized speed of combustion is the hallmark that sets them apart.