1.SiO2≥99.9%
2.Impurity Max each Ca/Mg/Na/Cu/Mn/Co/Pb/N/S 0.001%, Fe/Ni/K 0.002%
3.Size 40nm
4.LOI (950 °C, 2h) 6.0%
Packing 25kgs in woven bag with plastic bag inside
