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 ) 
5.5-7.0
Water content %(w/w) ≤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 ≤100
Solubility  g/100cm3 water  About 0.5
Average particle size μm 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.
 
Safety and toxicity
Acute oral toxicity LD50 (rat): ≥2000mg/kg LD50
Storage: Dry, at room temp.
 
Packing
25kg / bag, paper bag lined with PE bag or as customer's requirements