Used in making high efficiency detergent and metal cleaner.instead of STPP. Sodium metasilicate anhydrous is strongly alkaline, having strong capacity of cleaning, ... pollution, preventing corrosion for metal (zinc, aluminum, etc.). Therefore, sodium metasilicate anhydrous is widely used for the manufacture of a variety ... )%WhitenessLS-P80250-5240-42≤0.2 ≤0.03 ≥75 Sodium metasilicate anhydrous