Author: Mark Velov
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Last Updated:
January 27, 2026
Characteristics: The food supplement E 315 (erythorbic or iso ascorbic acid - Erythorbic or Isoascorbic Acid) belongs to the group of antioxidants. The physical properties of this acid with
Food supplement E 315 (erythorbic or iso ascorbic acid - Erythorbic or Isoascorbic Acid) belongs to the group of antioxidants. The physical properties of this acid are similar to those of ascorbic - white or yellow - white crystalline powder with a sour taste. Good solubility in water and alcohols, in glycols - medium, practically insoluble in oils and fats. Isocorbic acid is easily oxidized by oxygen in the air and reacts actively in water, so it should be stored in a container that is impervious to moisture and light. It is obtained from sucrose.
Erythorbic acid is approved for use in the EU and Russia. It is used as an antioxidant in the preparation of various meat semi-finished products, minced meat, sausages (up to 500 mg / kg); in the production of canned fish and frozen fish with red skin (up to 1.5 mg / kg). The addition of E 315 reduces the amount of nitrites to 1/3. Erythorbic acid is used as a color fixative in the manufacture of soft and soft drinks and as a color stabilizer in canned fruits (eg apple puree). It is not used as a vitamin supplement because the activity of vitamin C in it is about 5%, compared to ascorbic acid. Outside the food industry, the substance is also used as an antioxidant in various chemical, enzymatic and galvanic processes.
There is no permissible daily amount for the supplement E 315. Isoascorbic acid acts on the body, as well as ascorbic acid. It is characterized by the following positive properties: increases immunity, participates in redox processes, reduces the permeability of blood vessels and more. However, erythorbic acid is not as well absorbed as ascorbic acid, is retained in the tissues and excreted rapidly. In some cases, it can cause inflammation of the skin, mucous membranes of the eyes and respiratory tract. The action of the substance is less noticeable compared to ascorbic acid.