Silicon Dioxide NL-300A Chemistry character: precipitation analysis Silicon Dioxide General character: Especial Silicon Dioxide based on gel chromatography ,high surface area .good rigidity, stronge dispersity, good refractive index, as matting powder in top grade paintings and coatings industries,which it has better effect. Application: paintings,coatings Item value Appearance very fine powder Loss on drying 105C 2h % 4.0-6.0 Ignition loss 1000C % 5-6 PH value 6.5-7.5 BET speciflc surface area m2/gBET ≥300 DBP absorption value cm3/gDBP ≥3.2 SiO2% ≥98.0% Average particle μm 3