Which statement best describes the nine hazard classes used in hazmat classification?

Which statement best describes the nine hazard classes used in hazmat classification?

• A. Flammable, toxic, corrosive, reactive, and five other classes
• B. Only flammable liquids
• C. Textiles and plastics categories only
• D. Weather and wind speed categories

Answer: (A)

Hazmat classification uses nine hazard classes to categorize materials by their principal hazards. The statement is correct because it acknowledges common hazard types—flammable, toxic, corrosive, and reactive—and that there are five additional classes to complete the nine. In practice, the nine classes cover explosives; gases; flammable liquids; flammable solids; oxidizers and organic peroxides; toxic substances (including infectious substances); radioactive materials; corrosive substances; and miscellaneous dangerous goods. Other options focus on only one aspect or irrelevant topics, which don’t reflect the standardized system used for hazard communication and response.