... ,%13.5-15.5Fineness (Residue on 45um sieve ), % ≤0.1Specific gravity, g/cm32.67Melting pointoC;980Temp. of dehydration oC>320Refractive index1 ... solubility in water, good thermal stability, fine particle size, low specific gravity, great free-flowing etc. As one high efficient flame retardant ...