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Industrial phosphoric acid is a colorless transparent viscous liquid or orthorhombic crystal, odorless, taste very sour. The content of phosphoric acid in the market is mostly 85%, which is colorless, transparent or slightly light-colored thick liquid. It is mainly used in electroplating industry, pharmaceutical industry, phosphate industry and metallurgical industry and other fields. For example, in the pharmaceutical industry, it is used in the manufacture of sodium oleophosphate, iron phosphate, etc., and also in the manufacture of zinc phosphate as a dental filling adhesive. In the metallurgical industry, it is used to produce phosphoric acid refractory mud to increase the service life of steelmaking furnaces.

The physical and chemical properties of industrial phosphoric acid also make it widely used in other fields. Its melting point is 42.35 ℃, when the boiling point reaches 213 ℃, it will lose water and generate pyrophosphoric acid. Its relative density is d181.834 and it is soluble in water and ethanol. In addition, although its acidity is weaker than strong acids such as sulfuric acid, hydrochloric acid and nitric acid, it is stronger than weak acids such as acetic acid and boric acid.

However, industrial phosphoric acid also has its risks. Phosphoric acid vapor has a strong corrosive effect on the skin, and can cause skin inflammatory diseases, and even cause systemic poisoning. Therefore, the staff in the use of phosphoric acid, should pay attention to protect the respiratory organs and skin.

In agricultural production, phosphoric acid is an important intermediate product of chemical fertilizer industry production, which is used to produce high concentration phosphate fertilizer and compound fertilizer. In the coating industry, phosphate can be used as a pigment with special functions, used as flame retardant, rust, corrosion, radiation resistance, antibacterial, luminescent and other additives.

Please note that although industrial phosphoric acid has a wide range of applications in many fields, it must comply with relevant safety regulations when used to ensure the safety of personnel and the environment.