Calcium tartrate

Structural formula
Calcium salt of L -tartaric acid
General
Surname	Calcium tartrate
other names	E  354 CALCIUM TARTRATE ( INCI ) Calcium tartrate Calcium 2,3-dihydroxybutanedioate ( IUPAC )
Molecular formula	C 4 H 4 CaO 6
Brief description	colorless solid
External identifiers / databases
CAS number 3164-34-9 5892-21-7 (tetrahydrate) 110720-66-6 (DL) EC number 221-621-5 ECHA InfoCard 100.019.656 PubChem 9815471 Wikidata Q416767
properties
Molar mass	188.15 g mol −1
Physical state	firmly
solubility	0.4 g l −1 in water (10 ° C)
safety instructions
GHS labeling of hazardous substances (+) - Calcium L-tartrate hydrate no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Calcium tartrate (also calcium tartrate ) is a chemical compound from the group of tartrates , more precisely the calcium salt of tartaric acid , usually L -tartaric acid.

Occurrence

Calcium tartrate occurs naturally as an ingredient in many fruits and is one of the main components of tartar that settles in wine barrels .

Extraction and presentation

Calcium tartrate can be obtained by reacting potassium hydrogen tartrate with calcium oxide .

${\displaystyle \mathrm {2\ C_{4}H_{5}KO_{6}+CaO\longrightarrow C_{4}H_{4}K_{2}O_{6}+C_{4}H_{4}CaO_{6}+H_{2}O} }$

The reaction of potassium tartrate with calcium chloride or calcium hydroxide is also possible .

${\displaystyle \mathrm {C_{4}H_{4}K_{2}O_{6}+CaCl_{2}\longrightarrow C_{4}H_{4}CaO_{6}+2\ KCl} }$

properties

Calcium tartrate is a colorless solid that is hardly soluble in water. The tetrahydrate has an orthorhombic crystal structure.

use

Calcium tartrate is used in the food industry as a raising agent , complexing agent , acidulant and acid regulator . It is generally approved in the EU as a food additive with the number E 354 without maximum quantity restriction ( quantum satis ) for all foods.

Individual evidence

1. ↑ Entry on E 354: Calcium tartrate in the European database for food additives, accessed on June 28, 2020.
2. ↑ Entry on CALCIUM TARTRATE in the CosIng database of the EU Commission, accessed on August 6, 2020.
3. ↑ ^{a b c} David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-56.
4. ↑ ^{a b} Data sheet (+) - Calcium L-tartrate hydrate from Sigma-Aldrich , accessed on September 30, 2011 ( PDF ).
5. ↑ ^{a b} calcium tartrate
6. ^ Alfred Joseph Naquet : Fundamentals of modern chemistry, Volume 2 . 1870 ( page 355 in Google book search).
7. ↑ Margitta Albinus: Hager's Manual of pharmacy practice: substances E - O . 1994, ISBN 978-3-540-52688-9 ( page 1205 in the Google book search).
8. ↑ Infrared spectroscopic and thermal studies of calcium tartrate single crystals grown by silica-gel technique , Journal of Materials Science Letters, Volume 12, Number 15, pp. 1210-1211, doi : 10.1007 / BF00274502 .