Oregon OSHA

Topic index



Flammable and combustible liquids are liquids that burn when they give off enough vapors to ignite. They are classified as either flammable or combustible by their flashpoints.

A flashpoint is the lowest temperature at which a liquid gives off enough vapor to ignite at the surface of the liquid. Flashpoints are intended to be used as guides and not as fine lines between safe and unsafe.

Flammable and combustible liquids are present in almost every workplace. Fuels and many common products, such as solvents, thinners, cleaners, adhesives, paints, waxes, and polishes, may be flammable or combustible liquids.