C5H4CaO64H2O

The chemical formula C5H4CaO64H2O represents calcium citrate tetrahydrate. It is the tetrahydrate form of calcium citrate, a salt of citric acid and calcium. In this compound, five carbon atoms, four hydrogen atoms, one calcium atom, and six oxygen atoms form the calcium citrate molecule, and it is associated with four molecules of water of hydration.

Calcium citrate tetrahydrate typically appears as a white crystalline powder. It is sparingly soluble in water, meaning it dissolves in small amounts. The presence of water molecules in its crystal structure, indicated by the "4H2O", is characteristic of hydrated salts.

This compound is commonly used as a food additive. It serves as a firming agent, a nutrient supplement (providing calcium), and a pH adjuster in various food products. Its role as a firming agent is often seen in canned fruits and vegetables, helping to maintain their texture. As a calcium supplement, it is incorporated into foods and dietary supplements to increase calcium intake. It is generally recognized as safe (GRAS) by regulatory bodies for its intended uses in food. Calcium citrate tetrahydrate is also utilized in some pharmaceutical applications, primarily for calcium supplementation.