Potassium tartrate

Potassium tartrate
Names
IUPAC name
Dipotassium 2,3-dihydroxybutanedioate
Other names
Dipotassium tartrate; Argol; E336
Identifiers
921-53-9 (L) N
ChemSpider 2697916 YesY
Jmol interactive 3D Image
PubChem 8984
Properties
C4H4K2O6
Molar mass 226.268 g/mol
Appearance colorless, slightly opaque crystals
Density 1.984 g/cm3
Solubility insoluble in alcohol
1.550
Structure
monoclinic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
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.

Manufacturing

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

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.

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