Metaphosphoric acid CAS 37267-86-0

Metaphosphoric acid (HPO3) is a sort of easily deliquescent strong with high poisoning. Glassy colorless solid; Soft and transparent; Deliquescence; Sublimation at red heat; Slowly dissolve in cold water and decompose into phosphoric acid; Soluble in alcohol. Metaphosphoric acid is a polymerized glassy solid obtained by heating phosphoric acid for a long time. When phosphoric acid H3PO4 or pyrophosphoric acid h4p2o7 is heated to more than 300 ° C, transparent glassy composition (HPO3) n will be produced when cooled. Metaphosphoric acid can also be obtained by dissolving phosphorus pentoxide in cold water for partial hydration.

Metaphosphoric acid as well as phosphoric acid have the exact same anhydride: phosphorus pentoxide. The difference is that phosphorus pentoxide responds with hot water to generate phosphoric acid, as well as reacts with cold water to create metaphosphoric acid (or polymetaphosphoric acid (HPO3) n, such as trimethyl metaphosphoric acid (HPO3)3).

Phosphonate (1 -) is a monovalent inorganic anion obtained by deprotonation of among the two OH groups in phosphonic acid. It is a phosphorus oxide anion and a monovalent not natural anion. It is a conjugated base of phosphonic acid. It is a conjugated acid of phosphonate (2 -).