Sodium adipate

Structural formula
General
Surname	Sodium adipate
other names	Disodium adipate Sodium hexanedioate E  356
Molecular formula	C 6 H 8 Na 2 O 4
Brief description	colorless solid
External identifiers / databases
CAS number 7486-38-6 EC number 231-293-5 ECHA InfoCard 100,028,448 PubChem 24073 Wikidata Q423296
properties
Molar mass	190.11 g mol −1
Physical state	firmly
solubility	584.9 g l −1 (14 ° C)
safety instructions
GHS labeling of hazardous substances 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 .

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

Manufacturing

Sodium adipate can be prepared by reaction of adipic acid with sodium carbonate can be produced.

${\displaystyle \mathrm {(CH_{2})_{4}(COOH)_{2}+Na_{2}CO_{3}\ \longrightarrow \ (CH_{2})_{4}(COO^{-})_{2}(Na^{+})_{2}+H_{2}O+\ CO_{2}\uparrow } }$

The neutralization of sodium hydroxide solution with an ethanolic solution of adipic acid also yields sodium adipate.

${\displaystyle \mathrm {(CH_{2})_{4}(COOH)_{2}+2\ NaOH\ \longrightarrow \ (CH_{2})_{4}(COO^{-})_{2}(Na^{+})_{2}+2\ H_{2}O} }$

properties

Sodium adipate is a colorless solid that is easily soluble in water. It crystallizes as a hemihydrate in shiny, slightly hygroscopic leaflets. The enthalpy of solution of sodium adipate at 298.15 K is 15.70 kJ mol ⁻¹ . The electrolysis of an aqueous solution of sodium adipate produces cyclobutane .

use

Sodium adipate is used as a food additive as a complexing agent and acid regulator . It is also used as a stabilizer for PVC . Barium adipate can be produced by precipitation of a hot barium chloride solution with sodium adipate .

${\displaystyle \mathrm {(CH_{2})_{4}(COO^{-})_{2}(Na^{+})_{2}+BaCl_{2}\ \longrightarrow \ 2\ NaCl+(CH_{2})_{4}(COO)_{2}Ba\downarrow } }$

Individual evidence

1. ↑ Entry on E 356: Sodium adipate in the European database on food additives, accessed on June 28, 2020.
2. ↑ ^{a b c d} Entry on disodium adipate in the GESTIS substance database of the IFA , accessed on May 22, 2017(JavaScript required) .
3. ^ ^{A b c d} W. Dieterle, C. Hell: On the knowledge of adipic acid . In: Ber. d. German chem. Ges . tape 17 , 1884, p. 2221–2228 ( digitized on Gallica ).
4. ↑ M. Vera, L. Franco, J. Puiggalí: Synthesis of poly (ester amide) s with lateral groups from a bulk polycondensation reaction with formation of sodium chloride salts . In: Journal of Polymer Science A: Polymer Chemistry 2008 , 46 (2), pp. 661-667. doi: 10.1002 / pola.22414
5. ↑ ^{a b} Source: Page no longer available , search in web archives: PRODUCT SPECIFICATION Sodium Adipate  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.  
6. ↑ MZH Rozaini, P. Brimblecombe: The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, glutarate, adipate and in water from T = (279.15 to 358.15) K . In: The Journal of Chemical Thermodynamics 2009 , 41 (9), pp. 980-983. doi: 10.1016 / j.jct.2009.03.017
7. ^ Rachna Sagar: Together with Aieee Chemistry , Verlag Rachna Sagar, ISBN 978-81-8137-365-6 , p. 481 ( limited preview in Google Book Search).