phosphite ion hydrogenphosphite phosphite(3-) [PO3](3-) PHOSPHITE ION A trivalent inorganic anion obtained by removal of all three protons from phosphorous acid. chebi_ontology trioxophosphate(III) Phosphit trioxidophosphate(3-) PDBeChem:PO3 Gmelin:68617 78.97196 -3 CHEBI:45064 CHEBI:29197 phosphite CHEBI:45060 78.96015 [O-]P([O-])[O-] InChI=1S/O3P/c1-4(2)3/q-3 trioxophosphate(3-) O3P PO3(3-) AQSJGOWTSHOLKH-UHFFFAOYSA-N trivalent inorganic anion