Calcium tartrate
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| Calcium tartrate | |
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| IUPAC name | 2,3-Dihydroxybutendioic acid calcium salt |
| Identifiers | |
| CAS number | [3164-34-9] dihydrate [5892-21-7] anhydrous |
| SMILES | [Ca++]-OC(=O)C(O)C(O)C(=O)O- |
| Properties | |
| Molecular formula | CaC4H4O6 |
| Molar mass | 188.15 g/mol (anhydrous) 260.21 g/mol (tetrahydrate) |
| Appearance | hygroscopic white powder or colorless crystals |
| Density | 1.817 g/cm³ tetrahydrate |
| Melting point |
tetrahydrate decomposes at 160 °C |
| Solubility in water | 0.037 g/100 ml (0 °C) |
| Structure | |
| Crystal structure | d or l rhombic dl triclinic |
| Hazards | |
| MSDS | Calcium tartrate |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Calcium tartrate is a byproduct of the wine industry, prepared from wine fermentation dregs. It finds use as a food preservative. Like tartaric acid, calcium tartrate has two asymmetric carbons, hence it has two chiral isomers and a non-chiral isomer (meso-form). Most calcium tartrate of biological origin is the chiral levorotatory (–) isomer.
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