E331

E331 is the European code used to refer to any of the three kinds of sodium citrate (sodium salts of citric acid): monosodium citrate (NaH2C6H5O7), disodium citrate (Na2HC6H5O7) or trisodium citrate (Na3C6H5O7). They are used as food additives, usually for flavour or as a preservative.

Sodium citrate is the acidity regulator used in Lima Lush, a Muggle brand of citrus-flavoured fizzy drink.

Appearances

 * Harry Potter and the Deathly Hallows: Part 1
 * Harry Potter Limited Edition