... better moisture absorption effect Sodium metasilicate anhydrous is an inorganic white powder or crystalline granules, non-toxic, tasteless and environment-safe. It is ... , dispersing, wetting, penetrating, and also has the capability of buffering PH value. Checking itemTest standard(HG/T2568-94) Sodium oxide(Na2O)%28 ... .0% Solution12~13 Melting Point72.2 Particular Size16-30mesh≥90% sodium metasilicate