... capacity of cleaning, buffering and softening. Introduction for sodium metasilicate anhydrousSodium metasilicate anhydrous is strongly alkaline, having strong ... corrosion for metal (zinc, aluminum, etc.). Therefore, sodium metasilicate anhydrous is widely used for the manufacture of a ... . It is easy soluble in water, insoluble in alcohol or in acid producing an alkaline solution, very hygroscopic ...