Technical Data Sheet Ammonium Polyphosphate CAS No. 68333-79-9 Chemical Formula (NH4PO3) n, (n>1000) Appearance White, free-flowing powder Specifications P %(w/w) 31.0-32.0 N %(w/w) 14.0-15.0 pH value(10% suspension ) 5.5-7.5 Moisture %(w/w) â?¤0.25 Thermal decomposed temp. °C 275 Density at 25°C g/cm3 About 1.9 Bulk density at 25°C g/cm3 About 0.7 Viscosity (25°C,10% suspension ) mpa.s â?¤100 Solubility g/100cm3 water 0.5 Average particle size m About 15 Applications On account of low water-solubility, SHIAN-APP-II is specially suitable to be used as acid source for intumescent coatings. Intumescent coatings on the steel structure can meet the requirements the DIN4102 fireproofing grade. For polyurethane foams, SHIAN-APP-II is a suitable halogen-free flame retardant. SHIAN-APP-II has an excellent flame retardant effect in the fibre base material such as paper and wood products. Adding 15-20% SHIAN-APP-II to Casting resins based on epoxy resins or unsaturated polyester resins can reach UL 94-V0 grade.