Precipitation analysis Silicon Dioxide WL-200 General characteristic: WL-200 has all excellences of WL-180, also has high quality, very fine, many hole secondary particle, hydrophile, adsorption, silutedness. Etc. Application: Silicon rubber, coatings, paper making, pesticide. Technique Index: Item Index Appearance fine powder Loss on drying 105C 2h % ≤8.0 Ignition loss 1000C % ≤7.0 PH 6.7-7.1 BET specific surface area m2/g 170-200 DBP absorbed value cm3/g 2.20-2.50 SiO2% ≥93 Na2SiO4% ≤0.80 Average particle μm 7.0-11.0 Granularity distributing