Phosphate is a salt of phosphoric acid which is quite simply produced by chemical means. However, phosphates also occur naturally in both animals and plants. In our body, phosphates are naturally involved in the body's metabolism, where most of it is found in the bones.
Disodium phosphate has E-number 339. In the USA it has the designation GRAS, which means that the substance is safe to ingest.
Sodium phosphate is available in several varieties. For use in dietary supplements, disodium phosphate is a white water-soluble powder that is used to give the contents a softer consistency and to bind liquid. It has preservative properties and is also widely used as an acidity regulator as it works excellently as a buffer solution that helps control pH.