Sodium citrate usually refers to trisodium citrate, though it can refer to any of the sodium salts of citric acid:

• Monosodium citrate
• Disodium citrate
• Trisodium citrate

Monosodium citrate

Monosodium citrate has the formula NaH₂(C₃H₅O(COO)₃).

Disodium citrate

Disodium citrate has the formula Na₂H(C₃H₅O(COO)₃). It is used as an antioxidant in food as well as to improve the effects of other antioxidants. It is also used as an acidity regulator and sequestrant.

Typical products include gelatin products, jam, sweets, ice cream, carbonated beverages, milk powder, wine, processed cheeses.

Trisodium citrate

Trisodium citrate has the chemical formula of Na₃C₆H₅O₇. It possesses a saline, or mildly tart, flavor. Trisodium citrate is chiefly used as a food additive, usually for flavor or as a preservative. Trisodium citrate is employed as a flavoring agent in certain varieties of club soda.

References