Ammonium polyphosphate(phase-II) (CF-APP201) Molecular formula : (NH4PO3)n n>1000 CAS No.: 68333-79-9 EINECS No.: 269-789-9 Model No.: CF-APP201 Ammonium polyphosphate(Phase II) is a non-halogen flame retardant. It acts as flame retardant by intumescence mechanism. When APP-II is exposed to fire or heat, it decomposes to polymeric phosphate acid and ammonia. The polyphosphoric acid reacts with hydroxyl groups to form a nonstable phosphate ester. Following dehydration of the phosphate ester, a carbon foam is built up on the surface and acts as an insulation layer. Specification : Specification Value Appearance White powder P Content %(w/w) í¦31 N Content %(w/w) >14 Decomposition Temperature íµ >270 Density(25íµ) g/cm3 ~1.9 Solubility g/100ml H2O, 25íµ ~0.5 pH value ( 10% aqueous suspension ) 5.5-7.5 Viscosity (10%suspension, 25oC)