... light green crystals, transparent or semi-transparent . Sodium Silicate is made from sodium oxide and silicon dioxide, the molar ratio between ... 1.0Silica oxide (SiO2), % :66 (+-1.0 )69+-1.076+-1.0Fe, % ≤ 0.05Insolubles in water,% ≤ 1 Use: Sodium Silicate ... , foundry,mineral floating select.,acid-resisting material,constructional material. Solid Sodium silicate: 50kg/bag , 1000kg/bag, 1250kg/bag pp/pe ...