Liquids having a flash point below 73Â°F (23Â°C) and having a boiling point at or above 100Â°F (38Â°C). Class IC. Liquids having a flash point at or above 73Â°F. (23Â°C) and below 100Â°F (38Â°C). The category of flammable liquids does not include com-. pressed gases or cryogenic fluids.