Potassium tartrate

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Potassium tartrate
Potassium tartrate.png
CAS number 921-53-9 N, (L)
PubChem 8984
ChemSpider 2697916 YesY
Jmol-3D images Image 1
Molecular formula C4H4K2O6
Molar mass 226.268 g/mol
Appearance colorless, slightly opaque crystals
Density 1.984 g/cm3
Solubility insoluble in alcohol
Refractive index (nD) 1.550
Crystal structure monoclinic
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Potassium tartrate, dipotassium tartrate or argol has formula K2C4H4O6. It is the potassium salt of tartaric acid. It is often confused with potassium bitartrate, also known as cream of tartar. As a food additive, it shares the E number E336 with potassium bitartrate.


Potassium tartrate is produced by the reaction of tartaric acid with potassium sodium tartrate (rochelle salt), and potassium sulfate, followed by filtration, purification, precipitation and drying.

Other compounds[edit]

Tartar emetic is produced when potassium tartrate is heated with antimony trioxide. Tartar emetic causes intense nausea, prostration and vomiting by irritating the gastrointestinal mucosa.[citation needed]