Calcium tartrate
Chemical compound
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Calcium tartrate, exactly calcium L-tartrate, is a byproduct of the wine industry, prepared from wine fermentation dregs. It is the calcium salt of L-tartaric acid, an acid most commonly found in grapes. Wikipedia
Formula: CaC4H4O6
Molar mass: 190.16484 g/mol (anhydrous); 260.21 g/mol (tetrahydrate)
Solubility in water: 0.037 g/100 ml (0 °C) 0.2 g/100 ml (85 °C)
Crystal structure: d or l rhombic; dl triclinic
Density: 1.817 g/cm3 (tetrahydrate)
Melting point: tetrahydrate decomposes at 160 °C; anhydrous decomposes at 650 °C