Chemical Properties : SiO2 : More then 85% -95% LOI: Less then 6.0 Mgo : Less then 2.0 Fe2O3 : Less then 0.9 AL2O3 : Less then 0.8 Cao : Less then 2.0 k20 :Less then 2.0 CI:Less than 0.02 Physical Properties : Grain size : Max 0.6 mm and Min 0.1 mm. Less then 0.1 mm : 5% max. Water content : Less then 3%