Sodium citrate may refer to any of the sodium salts of citric acid (though most commonly the third):
Trisodium citrateThe three forms of the salt are collectively known by the E number E331. Sodium citrates are used as acidity regulators in food and drinks, and also as emulsifiers for oils. Sodium citrate dihydrate powder is a white crystalline powder that is commonly used as a food additive, pharmaceutical excipient, and laboratory reagent. It is used as an acidity regulator, emulsifier, and preservative in food and beverage products. In the pharmaceutical industry, it is used as a buffering agent and anticoagulant. In the laboratory, it is used as a chelating agent and buffer in biochemical and molecular biology experiments. Its versatility and low toxicity make it a popular choice in various industries.