Inorganic feed phosphates are a high quality phosphorus source for animal feed. Most inorganic feed phosphates are derived from natural rock phosphate - the rock being chemically treated to make the phosphorus available for animals in the form of quality feed phosphates. The main inorganic feed phosphates are calcium, magnesium, calcium-sodium, calcium-magnesium, ammonium and sodium phosphates. These phosphates are constant in composition, low in impurities and considered by scientists as the best available source of phosphorus for animals. An adequate supply of inorganic feed phosphates in animal feed is essential for the optimal performance and well-being of animals. Therefore, feed phosphates are widely used in all types of feeds for all animal species.