“Category IV flammable” means a liquid with a flashpoint above 140 °F and at or below 199.4 °F. When a category IV flammable liquid is heated for use to within 30 °F of its flashpoint, the liquid needs to be handled in accordance with the requirements for a category III liquid with a flashpoint at or above 100 °F. When liquid with a flashpoint greater than 199.4 °F is heated for use to within 30 °F of its flashpoint, the liquid needs to be handled in accordance with the requirements for a Category IV flammable liquid.

Source. #14431, eff 11-22-25, EXPIRES: 11-22-35