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Related to orthophosphoric acid: metaphosphoric acid, orthophosphate
or·tho·phos·phor·ic ac·id(ōr'thō-fos-fōr'ik as'id),
Phosphoric acid, O=P(OH)3, distinguished by ortho- from metaphosphoric and pyrophosphoric acids, (HPO3)n and OP(OH2)OP(OH)2O, respectively, which are anhydrides of H3PO4; the ultimate anhydride is phosphorus pentoxide, P2O5.
orthophosphoric acid/or·tho·phos·phor·ic ac·id/ (-fos-for´ik) phosphoric acid.
or·tho·phos·phor·ic ac·id(ōr'thō-fos-fōr'ik as'id)
Phosphoric acid, O=P(OH)3, distinguished by ortho- from meta- and pyrophosphoric acids.
used in acid etch technique in dentistry.