| 词条 | Calcium tartrate |
| 释义 |
| Watchedfields = changed | verifiedrevid = 399704354 | Name = Calcium tartrate | ImageFile = Calcium L-tartrate Structural Formula V1.svg | ImageSize = 200px | ImageName = | IUPACName = 2,3-Dihydroxybutanedioic acid calcium salt | Section1 = {{Chembox Identifiers | SMILES = [Ca+2].O=C([O-])C(O)C(O)C([O-])=O | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID = 10606089 | InChI = 1/C4H6O6.Ca/c5-1(3(7)8)2(6)4(9)10;/h1-2,5-6H,(H,7,8)(H,9,10);/q;+2/p-2 | InChIKey = GUPPESBEIQALOS-NUQVWONBAP | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/C4H6O6.Ca/c5-1(3(7)8)2(6)4(9)10;/h1-2,5-6H,(H,7,8)(H,9,10);/q;+2/p-2 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = GUPPESBEIQALOS-UHFFFAOYSA-L | CASNo_Ref = {{cascite|correct|??}} | CASNo = 3164-34-9 | CASNo_Comment = (anhydrous) | CASNo2 = 5892-21-7 | CASNo2_Comment = (tetrahydrate) | RTECS = | PubChem = 3083790 | Section2 = {{Chembox Properties | Formula = CaC4H4O6 | MolarMass = 190.16484 g/mol (anhydrous) 260.21 g/mol (tetrahydrate) | Appearance = hygroscopic white powder or colorless crystals | Density = 1.817 g/cm3 (tetrahydrate) | Solubility = 0.037 g/100 ml (0 °C) 0.2 g/100 ml (85 °C) | MeltingPt = tetrahydrate decomposes at 160 °C anhydrous decomposes at 650 °C | Section3 = {{Chembox Structure | CrystalStruct = d or l rhombic dl triclinic | Section7 = {{Chembox Hazards | ExternalSDS = Calcium tartrate | MainHazards = | RPhrases = | SPhrases = }} 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. Its solubility decreases with lower temperature, which results in the forming of whitish (in red wine often reddish) crystalline clusters as it precipitates. As E number E354, it finds use as a food preservative and acidity regulator. 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. References{{Unreferenced|date =September 2007}}{{organic-compound-stub}} 4 : Calcium compounds|Tartrates|Preservatives|E-number additives |
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