Calcium phosphate appears as a white crystalline powder that is odourless and tasteless, is insoluble in ethanol, acetic acid but soluble in dilute nitric acid and hydrochloric acid. It slightly dissolves in water. It is found in bones, milk, teeth, and the ground. Calcium phosphate is used in dentistry and cosmetics. In certain situations, it is found in nanoparticle form, either on purpose or after degradation or mechanical abrasion. alcium phosphate is used as an antacid and dietary supplement in veterinary medicine. It is used in medicine as calcium replenisher, as a buffer in food, stabilizer in plastics, in the manufacturing of milk glass, in the production of fertilizers, in the manufacture of luminescent materials, to clarify sugar syrups and in dental powders. When the toxic doses are ingested, more than 2 g/kg, unusual skin sensitization occurs and inhaling it may cause chemical pneumonitis.