E356 (Sodium adipate) is a chemical compound, the sodium salt of adipic acid, which is obtained synthetically from beets and sugar cane by the reaction of adipic acid and sodium hydroxide.

It appears as a whitish, crystalline powder.

What it is used for and where

Food

Ingredient listed in the European food additives list as E356, acidity regulator.

Other uses

Retrogradation and short-term plasticisation of maize starch.

Production of nylon, polymers, synthetic fibres, plastics.

• Molecular Formula   C₆H₈Na₂O₄
• Molecular Weight   190.10
• CAS  7486-38-6
• UNII    3XG6T5KYKM
• EC Number   245-577-1
• DTXSID1044726
• IUPAC  disodium;hexanedioate
• InChl=1S/C6H10O4.2Na/c7-5(8)3-1-2-4-6(9)10;;/h1-4H2,(H,7,8)(H,9,10);;/q;2*+1/p-2
• InChl Key      KYKFCSHPTAVNJD-UHFFFAOYSA-L
• SMILES  C(CCC(=O)[O-])CC(=O)[O-].[Na+].[Na+]
• MDL number  MFCD00070498 
• Nikkaji       J125.424C
• RTECS    AV1770000

Synonyms:

• Hexanedioic acid, disodium salt
• disodium hexanedioate
• Adipic Acid Disodium Salt

Studies

Morgan, J., McLennaghan, A. W., & Pethrick, R. A. (1989). Polymer electrolytes: poly (ethylene adipate)-sodium iodide complexes. European polymer journal, 25(10), 1087-1090.

Holze, R. and Holze, R., 2016. Ionic conductance of sodium adipate. Electrochemistry: Subvolume B: Electrical Conductivities and Equilibria of Electrochemical Systems-Part 2: Deep Eutectic Solvents and Electrolyte Solutions, pp.1312-1312.

Sanhu, Z., Yazun, N., Junjiang, B. and Qiwang, L., 2009. Comparative study on enhancement limestone WFGD with adipic acid and sodium adipate. Chinese Journal of Environmental Engineering, 3(11), pp.2043-2046.

Cui, Z., Wang, H., Chen, Z., Zhang, Y., Tian, H., Yin, Z. and Li, J., 2021. Controllable oxidation of cyclohexanone to produce sodium adipate in an electrochemical reactor with a Pt NPs/Ti membrane electrode. International Journal of Chemical Reactor Engineering, 20(3), pp.343-355.