Name:Sodium tartrate Synonyms:Disodium tartrate; [R-(R*,R*)]-2,3-Dihydroxybutanedioic acid disodium salt Molecular Formula:C4H4Na2O6 Molecular Weight:194.05 CAS Registry Number:868-18-8 EINECS:212-773-3
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.