1.0 2011-09-21 00:12:32 UTC 2015-07-21 06:57:10 UTC FDB022346 Hydrogen phosphate The phosphate ion is a polyatomic ion with the empirical formula PO4H and a molecular mass of 94.97 daltons; it consists of one central phosphorus atom surrounded by four identical oxygen atoms in a tetrahedral arrangement. It is a hypervalent molecule (the phosphorus atom has 10 electrons in its valence shell). A phosphate, in inorganic chemistry, is a salt of phosphoric acid. Phosphates are also important in biochemistry and biogeochemistry. In agriculture phosphate refers to one of the three primary plant nutrients, and it is a component of fertilizers. In ecological terms, because of its important role in biological systems, phosphate is a highly sought after resource. Consequently, it is often a limiting reagent in environments, and its availability may govern the rate of growth of organisms. Addition of high levels of phosphate to environments and to micro-environments in which it is typically rare can have significant ecological consequences. In the context of pollution, phosphates are a principal component of total dissolved solids, a major indicator of water quality. [HMDB] [P(OH)O3](2-) [PO3(OH)](2-) ate Dianion ate Ion Biate Biphosphate HPO4(2-) Hydrogen ate Hydrogen ate anion Hydrogen ate dianion Hydrogen ate ion Hydrogen ic acid Hydrogen orthoate Hydrogen orthophosphate Hydrogen phosphate Hydrogen phosphate anion Hydrogen phosphate dianion Hydrogen phosphate ion HYDROGENATE ion HYDROGENic acid ion INORGANIC ATE group INORGANIC ic acid group Monohydrogen ate Monohydrogen phosphate Oric acid ion Phosphate dianion Phosphate ion Phosphoric acid ion HO4P 95.9793 95.961245032 hydrogen phosphate hydrogen phosphate 14066-19-4 OP([O-])([O-])=O InChI=1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)/p-2 NBIIXXVUZAFLBC-UHFFFAOYSA-L belongs to the class of inorganic compounds known as non-metal phosphates. These are inorganic non-metallic compounds containing a phosphate as its largest oxoanion. Non-metal phosphates Inorganic compounds Homogeneous non-metal compounds Non-metal oxoanionic compounds Non-metal phosphates Inorganic oxides Inorganic oxide Non-metal phosphate an inorganic phosphate divalent inorganic anion phosphate ion Solid logp -1 ChemAxon pka_strongest_acidic 1.8 ChemAxon iupac hydrogen phosphate ChemAxon average_mass 95.9793 ChemAxon mono_mass 95.961245032 ChemAxon smiles OP([O-])([O-])=O ChemAxon formula HO4P ChemAxon inchi InChI=1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)/p-2 ChemAxon inchikey NBIIXXVUZAFLBC-UHFFFAOYSA-L ChemAxon polar_surface_area 83.42 ChemAxon refractivity 12.41 ChemAxon polarizability 5.23 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 4 ChemAxon donor_count 1 ChemAxon physiological_charge -2 ChemAxon formal_charge -2 ChemAxon Specdb::MsMs 178224 Specdb::MsMs 178225 Specdb::MsMs 178226 Specdb::MsMs 180540 Specdb::MsMs 180541 Specdb::MsMs 180542 HMDB00973 28968 PI [Pyruvate dehydrogenase [lipoamide]] kinase isozyme 1, mitochondrial Q15118 PDK1 [Pyruvate dehydrogenase [lipoamide]] kinase isozyme 3, mitochondrial Q15120 PDK3 Pyruvate dehydrogenase kinase, isoenzyme 4 A4D1H4 PDK4