EXTINGUISHER FIRE 20-LB ABC DRY CHEMICAL. This Dry Chemical multipurpose extinguishing agent is perfect for use on Class A, B and C fires. It has a discharge time of 9 seconds and its operating temperature range is -65º to 120ºF. Ideal for public areas such as offices, classrooms, churches, parking lots, among others. In addition, it is UL Listed, USCG Approved, and DOT compliant.