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Not to be confused with phosphate soda or phosphonate. A phosphate (PO3â. 4) is an inorganic chemical and a salt of phosphoric acid. In organic chemistry, a phosphate, or organophosphate, is an ester of phosphoric acid. Of the various phosphoric acids and phosphates, organic phosphates are important in biochemistry and biogeochemistry (ecology), and inorganic phosphates are mined to obtain phosphorus for use in agriculture and industry.
(Science: chemistry) A phosphate group on a larger molecule, where the phosphorus is single bonded to each of the four oxygen s, and the other bond of one of the oxygen s is attached to the rest of the molecule. phosphate group. A functional group important in energy trans fer.