Iron(II) phosphate, also ferrous phosphate, Fe3(PO4)2, is a phosphate of iron. It is used in garden chemicals such as moss killers and slug pellets. A phosphate, an inorganic chemical, is a salt of phosphoric acid. In organic chemistry, a phosphate, or organophosphate, is an ester of phosphoric acid. Organic phosphates are important in biochemistry and biogeochemistry or ecology. Inorganic phosphates are mined to obtain phosphorus for use in agriculture and industry. At elevated temperatures in the solid state, phosphates can condense to form pyrophosphates.