Sodium erythorbate (Sodium isoascorbate)

E number E316INS 316CAS 6381-77-7

Used as an antioxidant.

Sodium erythorbate is a cure accelerator and antioxidant used widely in cured meats, where it speeds colour fixing and limits nitrosamine formation.

Where it is and isn’t permitted

Status of Sodium erythorbate (Sodium isoascorbate) by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationNot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.
Codex AlimentariusCodex Alimentarius Commission / JECFAPermitted, with conditions

4 food categories

no numerical limit (good manufacturing practice)

Show every food category
  • 04.2.2.7 Fermented vegetable (including mushrooms and fungi, roots and tubers, pulses and legumes, and aloe vera) and seaweed products, excluding fermented soybean products of food categories 06.8.6, 06.8.7, 12.9.1, — GMP
  • 09.1.2 Fresh molluscs, crustaceans, and echinoderms — GMP
  • 09.2.1 Frozen fish, fish fillets, and fish products, including molluscs, crustaceans, and echinoderms — GMP
  • 09.2.5 Smoked, dried, fermented, and/or salted fish and fish products, including molluscs, crustaceans, and echinoderms — GMP
CXS 192-1995 Table Three, INS 316and 4 further provisionsretrieved 2026-09-07

What it is made from

Made by neutralising fermentation-derived erythorbic acid with sodium.

  • Vegan
  • Vegetarian
CAS registry number
6381-77-7
InChIKey
PPASLZSBLFJQEF-RKJRWTFHSA-M
PubChem
CID 23683938

Every name it appears under

42 recorded names. A label may use any of them.

E number

  • E316

INS number

  • 316

CAS registry number

  • 6381-77-7

Other names

  • 2,3-Didehydro-3-O-sodio-D-erythro-hexono-1,4-lactone
  • Araboascorbic acid, monosodium salt, D-
  • Ascorbic Acid EP Impurity F Sodium Salt
  • BZ468R6XRD
  • C6H7NaO6
  • CCRIS 2517
  • D-Araboascorbic Acid Sodium Salt
  • D-Erythro-hex-2-enonic acid, gamma-lactone, monosodium salt
  • D-erythro-Hex-2-enonic acid, gamma-lactone, sodium salt (1:1)
  • D-isoascorbiate sodium
  • D-Isoascorbic acid Na salt
  • D-Sodiumisoascorbiate
  • E 316
  • Eribate N
  • Erythorbate, sodium
  • Erythorbic Acid Sodium Salt
  • Hex-2-enonic acid gamma-lactone, D-erythro-, monosodium salt
  • HSDB 741
  • INS NO.316
  • INS-316-
  • Isoascorbic acid sodium salt
  • Isona
  • Mercate 20
  • Monosodium D-erythro-hex-2-enonic acid gamma-lactone
  • Neo-cebitate
  • OZOBAN
  • Sodium (2R)-2-[(1R)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate
  • Sodium (R)-2-((R)-1,2-dihydroxyethyl)-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate
  • Sodium D-Araboascorbate
  • Sodium D-isoascorbate
  • Sodium D-Isoascorbiate
  • Sodium erythorbate
  • Sodium erythorbate (1:1)
  • SODIUM ERYTHORBATE (SODIUM ISOASCORBATE)
  • Sodium isoascorbate
  • Sodium isoascorbate monohydrate
  • SODIUM-ISOASCORBATE
  • sodium;(2R)-2-[(1R)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olate

Systematic names

  • sodium;(2R)-2-[(1R)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olate

Hazard reference values

Values set by assessing bodies. A body that has not set a value is not listed here.
TypeValuePopulationAssessed byOpinion
ADI6 mg/kg bw/dayconsumersEFSA ANS2015

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • gsfa retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/sodium-erythorbate-sodium-isoascorbate.json