The molecule is a phosphorus oxoacid that consists of a single pentavalent phosphorus covalently bound via single bonds to a single hydrogen and two hydroxy groups and via a double bond to an oxygen. The parent of the class of phosphonic acids. It has a role as a fungicide. It is a member of phosphonic acids and a phosphorus oxoacid. It is a conjugate acid of a phosphonate(1-). It is a tautomer of a phosphorous acid.
dihydroxy(oxo)phosphanium