Short Description:

Phosphoric acid CAS 7664-38-2

Phosphoric acid, also known as orthophosphate (molecular structure H3PO4), is a colorless, transparent, viscous liquid or orthorhombic crystal with no odor and a very acidic taste. 85% phosphoric acid is a colorless, transparent or slightly light colored, viscous liquid. Melting point 42.35 ℃, specific gravity 1.70, high boiling point acid, can be miscible with water in any ratio. When boiling at 213 ℃ (losing 1/2 of water), pyrophosphate is generated. When heated to 300 ℃, it becomes phosphoric acid. The relative density is 181.834. Easily soluble in water and soluble in ethanol. Phosphoric acid is a common inorganic acid in Chemicalbook 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 at different pH values, different acid salts can be generated. Can irritate the skin, cause inflammation, and damage body tissues. Concentrated phosphoric acid has an erosive effect when heated in porcelain. Moisture absorbing and sealed for storage. Commercial phosphoric acid is a viscous and concentrated solution containing 482% H3PO4. The high viscosity of phosphoric acid solution is due to the presence of hydrogen bonds in the solution.