Sodium citrate

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Sodium citrate may refer to any of the sodium salts of citric acid (though most commonly the third):

As food additives, the 3 forms of the salt are also collectively known by the E number E331 and the term sour salt is coined for this chemical, because it possesses flavours of sour and salty.

Food and drink[edit]

Sodium citrate is sometimes used as an acidity regulator in drinks, and also as an emulsifier for oils when making cheese. It allows the cheeses to melt without becoming greasy. Sodium citrate can be used as a flavouring (typically Club Soda) or as a food additive.