Calcium adipate

Structural formula
General
Surname	Calcium adipate
other names	Calcium hexanedioate
Molecular formula	C 6 H 8 CaO 4
External identifiers / databases
EC number	231-295-6
ECHA InfoCard	100.028.450
PubChem	185482
ChemSpider	161253
Wikidata	Q1026337
properties
Molar mass	184.20 g mol −1
Physical state	firmly
solubility	40.2 g l −1 (13 ° C)
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Calcium adipate is a chemical compound from the group of carboxylic acid salts and the calcium salt of adipic acid .

Manufacturing

Calcium adipate can be made by precipitating a hot calcium chloride solution with sodium adipate .

{\ displaystyle \ mathrm {(CH_ {2}) _ {4} (COO ^ {-}) _ {2} (Na ^ {+}) _ {2} + CaCl_ {2} \ \ longrightarrow \ 2 \ NaCl + (CH_ {2}) _ {4} (COO) _ {2} Ca \ downarrow}}

The neutralization of a calcium hydroxide solution with adipic acid also provides calcium adipate.

{\ displaystyle \ mathrm {(CH_ {2}) _ {4} (COOH) _ {2} + Ca (OH) _ {2} \ \ longrightarrow \ (CH_ {2}) _ {4} (COO) _ {2} Ca + 2 \ H_ {2} O}}

properties

Calcium adipate crystallizes as monohydrate in the triclinic crystal system in space group P 1 (space group no. 1) with the lattice parameters a = 589.9 pm , b = 679.8 pm, c = 1082.1 pm, α = 78.999 °, β = 81.831 ° and γ = 82.971 °. In the unit cell contains two formula units . It is much more soluble in cold water than in hot water - at 12 ° C 40.2 g dissolves in 1 liter of water, at 100 ° C only 12.0 g. Template: room group / 1

The pyrolysis of calcium adipate at 350 ° C yields cyclopentanone and calcium carbonate .

The standard free enthalpy of formation of calcium adipate is Δ _f G ⁰ = -1214.405 kJ / mol.

use

Calcium adipate has been suggested as an additive in cigarettes to reduce the amount of menthol added due to taste . It has also been suggested as an additive in toothpastes .

Individual evidence

↑ ^a ^b ^c ^d W. Dieterle, C. Hell: "To the knowledge of adipic acid" in Ber. d. German chem. Ges. 1884 , 17 , pp. 2221-2228. Full text
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ M. Mathew, S. Takagi, HL Ammon: "Crystal structure of calcium adipate monohydrate" in Journal of Chemical Crystallography 1993 , 23 (8), pp. 617-621. doi : 10.1007 / BF01325183
^ Raj K. Bansal: "A text book of organic chemistry", New Age International Verlag, 4th edition, ISBN 9788122414592 , p. 475 ( limited preview in the Google book search).
↑ Dissertation: "Experimental investigation and modeling of the solubility of limestone and gypsum in aqueous systems at higher ionic strengths", Dieter Loos, 2003, University of Duisburg-Essen. Full text (PDF; 1.2 MB)
↑ Patent US3082125 . full text
↑ patent US4460565 . full text

[Dieterle-1] W. Dieterle, C. Hell: "To the knowledge of adipic acid" in Ber. d. German chem. Ges. 1884 , 17 , pp. 2221-2228. Full text

[NV-2] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Mathew-3] M. Mathew, S. Takagi, HL Ammon: "Crystal structure of calcium adipate monohydrate" in Journal of Chemical Crystallography 1993 , 23 (8), pp. 617-621. doi : 10.1007 / BF01325183

[Bansal-4] Raj K. Bansal: "A text book of organic chemistry", New Age International Verlag, 4th edition, ISBN 9788122414592 , p. 475 ( limited preview in the Google book search).

[Loos-5] Dissertation: "Experimental investigation and modeling of the solubility of limestone and gypsum in aqueous systems at higher ionic strengths", Dieter Loos, 2003, University of Duisburg-Essen. Full text (PDF; 1.2 MB)

[Bavley-6] Patent US3082125 . full text

[Weststrate-7] tent US4460565 . full text