Imported Premium Precipitated silica

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Product Description

Precipitated silica is commonly known as silica black, also known as hydrated silica acid, light silica. The chemical expression is generally written as mSiO2·nH2O. The appearance is white amorphous powder with high dispersion. The specific gravity was 2.319 ~ 2.653, and the melting point was 1750℃. Insoluble in water and most acids, will absorb moisture in the air will become a concentration of fine particles. Soluble in caustic soda and hydrofluoric acid. Stable to other chemicals, resistant to high temperature, no decomposition, no combustion. High electrical insulation, porous, large internal surface area, water absorption, non - toxic.

Appearance		white powder
BET	m 2 /g	170-190
SiO2 ( Dry basis)	%	≥ 98
Heating Loss	%	4.0-7.0
Ignition Loss ( Dry basis)	%	≤ 7.0
PH		6-8
DBP	cm 3 /g	2.0-3.0
Soluble salts ( Na2SO4 )	%	≤ 1.5
Total iron	mg/kg	≤ 1000