ABC Powder Fire Extinguishing Agents 1.Basematerial: ammonium biphosphate 2.Put out A, B, C and electrical fires. With ammonium biphosphate as the basematerial, this product has undergone full solidification damp proof treatment. It has the ability to put out A (solid, timber and cotton paper), B (liquid, oil and benzene), C (gas), and electrical fires. ABC Powder Fire Extinguishing Agents