ABC or Multi-Purpose extinguishers utilize a specially fluidized and siliconized mono ammonium phosphate dry chemical. It chemically insulates Class A fires by melting at approximately 350 F and coats surfaces to which it is applied. It smothers and breaks the chain reaction of Class B fires and will not conduct electricity back to the operator. Also available in Wheeled and Stationary extinguishers.
ABC extinguishers are used for the following types of fires: