... -540-4 Purity: 99.5% Apperance: White crystalline powder 3. Borax Decahydrate MF: Na2B4O7.10H2O Molecular Weight: 381 ... , preservative, water softener, wash water, soap additives, ceramic glaze and glass raw materials. Borax also have an important role ... Borax Physicochemical properties:Colorless translucent crystals or white crystalline powder. Odorless, taste salty. Soluble in water and glycerine ...