项   目Item	技术指标Technique Data
外   观Appearance	白色粉末White powder
白   度Whiteness	优于、等于标样Greater than or equal to the standard
二氧化硅含量（干品）SiO2(dry)%	≥90
加热减量%105℃，2h Evaporation loss %105℃，2h	4.0—7.5
灼烧减量（干品）%1000℃ 2h Lgnition loss(dry) %1000℃ 2h	3.0—6.5
PH 值 Ph value	6.0－7.5
BET比表面积㎡/gBET special area ㎡/g	230-300
DBP吸收值㎝³/g DBP absorption ㎝³/g	≥3.4
总铁含量mg/kg  Totle Fe mg/kg	≤500
总铜含量mg/kg  Totle Cu mg/kg	≤30
总锰含量mg/kg  Totle Mn mg/kg	≤50
目   数 Mesh Count	≥2000

USES: mainly used in radial tire, rubber products, plastic film, paint coating production, also can be used in medicine, food, feed (additive, etc.) pesticides。