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WordReference Random House Unabridged Dictionary of American English © 2024phosphor′ic ac′id, [Chem.]- Chemistryany of three acids, orthophosphoric acid, H3PO4, metaphosphoric acid, HPO3, or pyrophosphoric acid, H4P2O7, derived from phosphorus pentoxide, P2O5, and various amounts of water.
Collins Concise English Dictionary © HarperCollins Publishers:: phosphoric acid n - Also called: orthophosphoric acid a colourless solid tribasic acid used in the manufacture of fertilizers and soap. Formula: H3PO4
Systematic name: phosphoric(V) acid - any oxyacid of phosphorus produced by reaction between phosphorus pentoxide and water
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