Tags: Chemical Compound, Chemical Substance.
Calcium citrate is the calcium salt of citric acid. It is commonly used as a food additive (E333) usually as a preservative but sometimes for flavor. In this sense it is similar to sodium citrate. Calcium citrate is also used as a water softener because the citrate ions can chelate unwanted metal ions. Calcium citrate is also found in some dietary calcium supplements (e.g. Citracal). Calcium makes up 24.1% of calcium citrate (anhydrous) and 21.1% of calcium citrate (tetrahydrate) by mass.
