California Code, Health and Safety Code - HSC § 13150

For purposes of this article, “flammable liquids” shall mean any liquid having a flashpoint below 100°F (37.8°C) and a vapor pressure not exceeding 40 pounds per square inch (absolute) at a temperature of 100°F (37.8°C). Flammable liquids may include crude oils and cutback asphalts. “Combustible liquid” shall mean a liquid having a flashpoint at or above 100°F (37.8°C), and below 200° F (93.3°C).

This does not include wine, or any other aqueous solution, having an alcoholic content less than, or equal to, 24 percent by volume. This exemption applies only if the nonalcohol portion of the aqueous solution does not fall within the definition of flammable or combustible liquid.

The provisions of this article also apply to liquids having a flashpoint of 200°F (93.3° C) or higher when such liquids, upon being heated, assume the characteristics of a flammable or combustible liquid.