Antimony potassium tartrate, also known as potassium antimonyl tartrate, potassium antimontarterate, or emetic tartar,has the formula K2Sb2(C4H2O6)2 and is the double salt of potassium and antimony of tartaric acid
A 2527 (OTTO) Antimony potassium tartrate, GR 99%+ Cas 28300-74-5 - used in the textile industry to aid in binding certain dyes to fabrics. It finds application in medicine as an expectorant and a nauseant.