Phosphoric acid is mainly used in the pharmaceutical, food, fertilizer and other industries, including as a rust inhibitor, food additive, dental and orthopedic, EDIC corrosive, electrolyte, flux, dispersant, industrial corrosive, fertilizer, raw material and component of household cleaning products. Also used as a chemical reagent, phosphate is a nutrient for all life forms.
Phosphoric acid or orthophosphoric acid, with a molecular weight of 97.994, is a common inorganic acid and is a moderately strong acid. It can be obtained by dissolving phosphorus pentoxide in hot water. Orthophosphoric acid is obtained by treating apatite with sulfuric acid in industry. Phosphoric acid is easily deliquescent in the air. Heating will lose water to obtain pyrophosphoric acid, and then further lose water to obtain metaphosphoric acid.
Extended information:
Application areas:
1. Agriculture: Phosphoric acid is the raw material for the production of important phosphate fertilizers (superphosphate, potassium dihydrogen phosphate, etc.), and also the raw material for the production of feed nutrients (calcium dihydrogen phosphate).
2. Industry: Phosphoric acid is an important chemical raw material. Its main functions are as follows:
(1) Treat the metal surface to generate an insoluble phosphate film on the metal surface to protect the metal from corrosion.
(2) Mixed with nitric acid as a chemical polishing agent to improve the smoothness of the metal surface.
(3) Phosphate esters, raw materials for the production of detergents and pesticides.
(4) Raw materials for the production of phosphorus-containing flame retardants.
3. Food: Phosphoric acid is one of the food additives. It is used as a sour agent and yeast nutrition in food, and Coke contains phosphoric acid. Phosphate is also an important food additive and can be used as a nutritional enhancer.
4. Medicine: Phosphoric acid can be used to prepare phosphorus-containing drugs, such as sodium glycerophosphate.
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