Erythorbic acid

• Erythorbic
• Isovitamin C
• E 315
• (R ) -5 - ( (R ) -1,2- dihydroxyethyl ) -3,4 -dihydroxy- 5H -furan- 2-one ( IUPAC)

Shiny crystals

Fixed

Decomposition 174 ° C

Soluble in water, ethanol and pyridine

Attention

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Iso-ascorbic acid (also erythorbic ) is an organic acid that is present at room temperature, a colorless, odorless, crystalline, readily water-soluble solid.

Isomers

It occurs as L- and D- iso-ascorbic acid. Their shapes are epimers of ascorbic acid.

Production

Iso-ascorbic acid is produced from sucrose.

Physiological effects

In the human organism iso-ascorbic acid increases the absorption of non-heme iron.

Use

Isoascorbic acid is used in the food industry as an antioxidant and stabilizer. In the U.S. it is increasingly being used as a preservative, since the use of sulfites for preservation of raw food is prohibited by law. Iso-ascorbic acid is approved in the EU as a food additive under the number E 315 for certain Fleischerzeignisse with maximum limits of 0.5, with fish products to 1.5 grams per kilogram.

The sodium salt of iso-ascorbic acid, Natriumisoascorbinat, carries the food additive E number 316