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Contact SupplierPhosphoric acid or orthophosphoric acid, chemical formula H3PO4, molecular weight of 97.9724, is a common inorganic acid, is the strong acid。Orthophosphoric acid is used to treat apatite with sulfuric acid. Phosphoric acid is easy to deliquescence in the air. Heating will lose water to get pyrophosphoric acid, and then further dehydration to get metaphosphoric acid. Phosphoric acid is mainly used in pharmaceutical, food, fertilizer and other industries, can also be used as chemical reagents.