Phosphoric acid or orthophosphoric acid, chemical formula H3PO4, molecular weight of 97.9724, is a common inorganic acid, medium - strong acid. It is obtained by dissolving phosphorus pentoxide in hot water. Phosphoric acid industry with sulfuric acid treatment of apatite immediately. Phosphoric acid tends to deliquescence in air. You lose water to get pyrophosphate, and then you lose more water to get metaphosphoric acid. Phosphoric acid is mainly used in pharmaceutical, food, fertilizer and other industries, including as rust inhibitor, food additive, dental and orthopedic surgery, EDIC etchant, electrolyte, flux, dispersant, industrial etchant, fertilizer raw materials and components of household cleaning products. Also used as chemical agents, phosphates are nutrients for all life forms.
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