Sodium tartrate

Sodium L-tartrate
IUPAC name disodium (2R,3R)-2,3-dihydroxybutanedioate
Other names Sal tartar; Disodium tartrate; Bisodium tartrate; Sodium L-(+)-tartrate; E335
Identifiers
CAS number	868-18-8 Y, (anhydrous) 6106-24-7 (dihydrate)
PubChem	13355
ChemSpider	12786 Y
UNII	QTO9JB4MDD Y
ATC code	A06AD21
Jmol-3D images	Image 1
SMILES [Na+].[Na+].O=C([O-])C(O)C(O)C([O-])=O
InChI InChI=1S/C4H6O6.2Na/c5-1(3(7)8)2(6)4(9)10;;/h1-2,5-6H,(H,7,8)(H,9,10);;/q;2*+1/p-2 Y Key: HELHAJAZNSDZJO-UHFFFAOYSA-L Y
Properties
Molecular formula	C4H4Na2O6 (anhydrous) C4H8Na2O8 (dihydrate)
Molar mass	194.051 g/mol (anhydrous) 230.082 g/mol (dihydrate)
Appearance	white crystals
Density	1.545 g/cm3 (dihydrate)
Solubility in water	soluble
Solubility	insoluble in ethanol
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Sodium tartrate (Na₂C₄H₄O₆) is used as an emulsifier and a binding agent in food products such as jellies, margarine, and sausage casings. As a food additive, it is known by the E number E335.

Because its crystal structure captures a very precise amount of water, it is also a common primary standard for Karl Fischer titration, a common technique to assay water content.

See also

• Monosodium tartrate

External links

• Properties of Sodium Tartrate at linanwindow
• Properties of Sodium Tartrate at JTBaker