Tthe existing form: Amorphous thin powder The typical color: Gray white in nature, the color is become darker with the density accretion) The BET Fineness: 15-27 m2/g The bulk density: 150-700 kg/m3 The activity target: 85%-125% The moisture: 1-3% The sio2 content:85-95% pls feel free to contact us,you must have a good market with our competitive price and quality !