Hazard class 3 corresponds to which material type?

Hazard class 3 corresponds to which material type?

• A. Flammable gas
• B. Flammable solid
• C. Flammable/combustible liquid
• D. Poisonous liquid

Answer: (C)

Hazard class 3 covers liquids that can ignite under normal handling conditions, and it includes liquids with a wide range of flash points. Flammable liquids have a flash point at or below 60°C, meaning they can form ignitable vapors at relatively low temperatures. Combustible liquids have higher flash points—above 60°C but below about 93°C—so they require hotter conditions to ignite, but they are still a fire hazard. To capture this whole fire-risk spectrum in one category, resources describe them together as flammable/combustible liquids. That’s why the correct choice is the flammable/combustible liquid. The other options describe different hazard classes: a poisonous liquid points to class 6, a flammable gas is class 2, and a flammable solid is class 4.

Hazard class 3 covers liquids that can ignite under normal handling conditions, and it includes liquids with a wide range of flash points. Flammable liquids have a flash point at or below 60°C, meaning they can form ignitable vapors at relatively low temperatures. Combustible liquids have higher flash points—above 60°C but below about 93°C—so they require hotter conditions to ignite, but they are still a fire hazard. To capture this whole fire-risk spectrum in one category, resources describe them together as flammable/combustible liquids. That’s why the correct choice is the flammable/combustible liquid. The other options describe different hazard classes: a poisonous liquid points to class 6, a flammable gas is class 2, and a flammable solid is class 4.