Phosphoric Acid 85% Food Grade

Phosphoric Acid is also called orthophosphoric acid (molecular structure formula H3PO4). The pure product is a colorless, transparent and viscous liquid or rhombic crystals. It is odorless and has a very sour taste. 85% phosphoric acid is a colorless, transparent or slightly light-colored, thick liquid. It has a melting point of 42.35°C and a specific gravity of 1.70. It is a high boiling point acid and can be miscible with water in any ratio. When the boiling point is 213°C (losing 1/2 of water), pyrophosphoric acid is generated. It turns into metaphosphoric acid when heated to 300°C. Relative density 181.834. Easily soluble in water and ethanol. Phosphoric acid is a common inorganic acid and is a medium-strong acid. Its acidity is weaker than strong acids such as sulfuric acid, hydrochloric acid, and nitric acid, but stronger than weak acids such as acetic acid, boric acid, and carbonic acid. When phosphoric acid reacts with sodium carbonate, different acid salts can be generated at different pHs. Can irritate the skin, cause inflammation, and destroy body tissue. Concentrated phosphoric acid has an corrosive effect when heated in porcelain. It is hygroscopic and should be kept sealed. Commercially available phosphoric acid is a viscous concentrated solution containing 82% H3PO4. The viscosity of the phosphoric acid solution is high due to the presence of hydrogen bonds in the solution.

The main application areas of phosphoric acid are as follows: phosphating treatment of metal surface steel pipes, preparation of electrolytic polishing liquid and chemical polishing liquid; polishing of aluminum products; manufacturing of various phosphates, feed grade calcium hydrogen phosphate, acid manganese phosphate, and potassium pyrophosphate; pharmaceutical industry Used to make sodium glycerophosphate and iron phosphate, to adjust the pH when making penicillin; used to make zinc phosphate as an adhesive for dental fillings; used in plastics as a catalyst for the condensation of phenolic resin; as a desiccant for the production of dyes and intermediates; for printing It is used to prepare cleaning agents for wiping off stains on offset color printing plates; matches are used to impregnate match stems, which can prevent the burned match stems from turning into ash and become charcoal, which is safer to use; used in metallurgy to produce refractory mud to improve steel-making furnaces Life span; rubber is used as a coagulant for slurries and raw materials for the production of inorganic binders; paint is used for metal anti-rust paint; it is used as an acidic flavoring agent in the food industry.

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