Synonyms: Phosphoric acid, o-phosphoric acid
Chemical formula: H3PO4
International name: Phosphoric acid, Orthophosphoric acid
CAS No: 7664-38-2
Appearance: colorless, odorless liquid
Packing: cans, 35 kg
Storage: store in a cool, dry, well-ventilated area
Phosphoric acid (phosphoric acid) - inorganic acid which under standard conditions is a colorless, hygroscopic crystals. At temperatures above 213 ° C is converted into orthophosphoric acid pyrophosphoric acid H4P2O7. It is very soluble in water. Often phosphoric (or phosphorous) acid is a 85% aqueous solution (colorless and odorless syrupy liquid). Soluble in ethanol and other solvents.
In industry, orthophosphoric acid (phosphoric acid, o-phosphoric acid) was obtained by extraction (sulfuric acid) or thermal methods. The extraction method is the decomposition of natural phosphates and sulfuric and phosphoric acids, followed by separation of the filters and the resulting acid insoluble CaSO4. The thermal method is based on the combustion of phosphorus to phosphorus pentoxide and P4O10 hydration last P4O10 + 6H2O = 4H3PO4.
Industrial phosphoric acid - a key intermediate for the production of phosphate fertilizers and complex technical phosphates and widely used for phosphatizing metal as a catalyst in organic synthesis. Food phosphoric acid is used to prepare soft drinks, pharmaceuticals, dental cements, etc.