Phosphoric acid or orthophosphate is a common inorganic acid, a medium strong acid with the chemical formula H3PO4 and a molecular weight of 97.994. Not easily volatile, not easily decomposed, and has almost no oxidizing properties. It has acidic properties and is a weak ternary acid. Its acidity is weaker than hydrochloric acid, sulfuric acid, nitric acid, but stronger than acetic acid, boric acid, etc.

Application field

Agriculture: Phosphoric acid is an important raw material for the production of phosphate fertilizers (such as superphosphate and potassium dihydrogen phosphate), as well as for the production of feed nutrients (such as calcium dihydrogen phosphate).

Industry: Phosphoric acid is an important chemical raw material, mainly used for the following purposes:

Processing metal surfaces to generate insoluble phosphate films on the metal surface to protect the metal from corrosion.

Mixing with nitric acid as a chemical polishing agent to improve the smoothness of metal surfaces.

Phosphate esters are raw materials used in the production of washing products and insecticides.

Raw materials for producing phosphorus containing flame retardants.

Food: Phosphoric acid is one of the food additives, used as an acidifier and yeast nutrient in food. Coke contains phosphoric acid. Phosphates are also important food additives and can be used as nutritional enhancers.

Medicine: Phosphoric acid can be used to produce phosphorus containing drugs, such as sodium glycerophosphate.