... ,SiO2 white powder Using in rubber,tyre,sole,feed,food,medical ETC. WHITE SILICAChemical name: Silica, precipitated, hydrated ... additives for foodstuff and medicines, and anti-inflammation agent in hygiene and fire-proof materials.Used for [medicine, ... properties, it is the best transparent reinforcement additive in rubber-based blends. It can greatly improve the ... is 20KGs. Silica white CAS:14464-46-1