Industrial phosphoric acid is an important inorganic acid, mainly used in the manufacture of various phosphates and oxidants. It has a colorless transparent or slightly light colored viscous liquid, sour taste and strong corrosive. Industrial phosphoric acid has a melting point of 42.35°C and a boiling point of 213°C. When heated to 300°C, it becomes metaphosphoric acid. Industrial phosphoric acid is easily soluble in water and ethanol, and its aqueous solution is acidic.

Industrial phosphoric acid is widely used, mainly in the following fields:

Electroplating industry: used for metal surface treatment, such as steel, copper and aluminum plating.
Pharmaceutical industry: used in the manufacture of sodium oleate, iron phosphate and other drugs, also used in the manufacture of dental fillings adhesive zinc phosphate.
Phosphate industry: used to manufacture various phosphates, such as ammonium phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate and trisodium phosphate. These phosphates can be used in the manufacture of other chemicals, detergents, pigments and food additives.
Metallurgical industry: used to produce phosphoric acid refractory mud and improve the service life of steelmaking furnaces.
Printing industry: used to prepare cleaning fluid, used to wipe off the stains on the offset printing plate.

Fuel and intermediate production: used as a desiccant and catalyst for the production of other chemicals.

However, industrial phosphoric acid has a strong corrosive effect on the skin, eyes and respiratory tract, so corresponding protective measures should be taken during operation. Personnel should wear chemical protective clothing, chemical protective glasses and chemical protective gloves, and avoid direct contact with industrial phosphoric acid.

In addition, industrial phosphoric acid should be stored in a dry, cool place, away from fire and heat sources. When using industrial phosphoric acid, safety operation procedures should be followed to ensure the safety of the working environment.