... detergent and metal cleaner.instead of STPP. Sodium metasilicate anhydrous is strongly alkaline, having strong capacity of cleaning, ... plastic maintenance agent, water retention agent, etc.PropertiesSodium metasilicate anhydrous is an inorganic white powder or crystalline granules, non ... soluble in water, insoluble in alcohol or in acid producing an alkaline solution, very hygroscopic when reacting ...