... Introduction: Ammonium polyphosphate(APP) molecular formula(NH4PO3)n, n>50, water-solubility less than 2g/100ml. As inorganic chain polymer, there ... , fiberboard, paper, fiber.3) Major fire retardant additive in plastic, resin and rubber expand fire retardant (IFR).4) Made into dry ... coalfield.4. Packing25kg polypropylene woven bag inner lining polyethylene film. water soluble ammonium polyphosphate