... or granules, soluble in water,insoluble in alcohol and Sodium metasilicate pentahydrate is strongly alkaline, having strong capacity of ... fat and oil, deflocculating to inorganic. It can replace STPP to be used for the manufacture of effective detergents and ... , preventing corrosion for metal (zinc, aluminum, etc.). Therefore, sodium metasilicate pentahydrate is widely used for the manufacture of a ...