Sodium Bicarbonate Powder Extinguishing Agent (i.e. BC Dry Chemical Powder) Features This product is made from Sodium Bicarbonate and treated by complete silication damp-proof and caking-proof processing.It can be used in the fire-fighting to extinguish fires of class B and class C, or be applied together with foam.Currently,its a kind of low-cost power extinguishing agent that most commonly applied in China.