If a liquid has a flash point of exactly 100 °F, how is it classified?

If a liquid has a flash point of exactly 100 °F, how is it classified?

• A. Flammable liquid
• B. Combustible liquid
• C. Nonflammable liquid
• D. Hazardous liquid

Answer: (B)

Classification relies on the flash point—the lowest temperature at which a liquid gives off enough vapor to ignite. The dividing line used is 100 °F: liquids with flash points below 100 °F are flammable, while those at or above 100 °F are combustible. A liquid with a flash point of exactly 100 °F sits at that boundary, so it is classified as a combustible liquid. This distinction guides storage and handling requirements, with combustible liquids generally subject to less stringent controls than flammable ones.

Classification relies on the flash point—the lowest temperature at which a liquid gives off enough vapor to ignite. The dividing line used is 100 °F: liquids with flash points below 100 °F are flammable, while those at or above 100 °F are combustible. A liquid with a flash point of exactly 100 °F sits at that boundary, so it is classified as a combustible liquid. This distinction guides storage and handling requirements, with combustible liquids generally subject to less stringent controls than flammable ones.