... /week , port of loading : tianjin port or shanghai . Ammonium Polyphosphate (APP) Molecular Formula: (NH4)n+2PnO3n+1Standard: HG/T2770-1996Properties: ... long-chain ammonium polyphosphate is higher than 50; the solubility in water is lower than 2g in every 100ml ... multistory building, ships, trains, cables, etc. 2. used in the flameproof treatment for woods, plywood, fiberboard, papers, fibers ...