CAS Number: 6106-24-7
Molecular Weight: 230.08
Linear Formula: C4H4Na2O6 · 2H2O
IUPAC Names: Disodium (2R,3R)-2,3-dihydroxybutanedioate
Other Names: L-(+)-Tartaric acid disodium salt, Disodium tartrate dihydrate, Sodium tartrate dibasic dihydrate, Sodium tartrate dihydrate, Sal tartar, Bisodium tartrate, Sodium L-(+)-tartrate, E335.
Sodium tartrate (Na2C4H4O6) is used as an emulsifier and a binding agent in food products such as jellies, margarine and sausage casings. As a food additive, it is known by the E number E335.
Because its crystal structure captures a very precise amount of water, it is also a common primary standard for Karl Fischer titration, a common technique to assay water content.
