Due to the molecular contains oxygen phosphorus and ester bond,space steric hindrance is bigger.So it has not easy ,high thermal stability.
For stability in water and alkali,it can dissolve in most organic matter.
Besides stable flame retardant,it also has increase plastic,moisture resistance,antistatic property,tensile resistance,resistance to compression effect.
The products are mainly used in unsaturated polyeester,phenolic resin,pvc,rubber,synthetic fibeer,other plastic and coating.

Acidity................................0.1 mg KOH/g max
Water.................................0.1 w/w% max
specific density................1.49-1.51
refractive index.................1.468-1.528
viscosity.............................1600-1900
flash point..........................251