E315Erythorbic acid

E315 is erythorbic acid (isoascorbic acid), an isomer of ascorbic acid (E300). In food it is an antioxidant, often used in processed meats to help keep their colour.

Code: E315 · INS 315
Group: Antioxidant

In Vietnam✓ PermittedOn the list of permitted additives — Circular 24/2019, Appendix 1

Risk level on the Yenzo Scalevery low?Based on the Open Food Facts additives taxonomy

How E315 appears on labels

IngredientsIllustrative example

Wheat flour, vegetable oil, salt, sugar, antioxidant (315), dried onion and garlic, pepper, natural colour (160a).

antioxidant (315)antioxidant 315E315INS 315On Vietnamese labels: Acid erythorbic (acid isoascorbic)

Erythorbic acid in food

Processed meat Fish and seafood, canned Milk, cheese, cream Confectionery Baked goods Noodles, pasta, cereals Seasonings, soup cubes, sauces

Eggs and egg products

Questions about erythorbic acid

What is E315 (erythorbic acid)?

It is erythorbic acid (isoascorbic acid), an isomer of ascorbic acid (E300). Circular 24/2019/TT-BYT lists E315 as an antioxidant.

Is isoascorbic acid harmful?

In 2016 EFSA re-evaluated erythorbic acid (E315) and sodium erythorbate (E316) and concluded that there is no reason to revise the current ADI of 6 mg/kg body weight a day. EFSA calculated the combined exposure to both, found that no population group exceeds the ADI, and concluded that their use as food additives at the permitted or reported uses and use levels would not be of safety concern.

Is INS 315 permitted in Vietnam?

Yes. Erythorbic acid (isoascorbic acid) (INS 315) is listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food, with the function antioxidant.

Other antioxidants

E310Propyl gallatelow E311Octyl gallatehigh E312Dodecyl gallatehigh E316Sodium erythorbatevery low E319Tertiary-butyl hydroquinone (TBHQ)low E320Butylated hydroxyanisole (BHA)moderate

See all antioxidants →

Updated 21 October 2026

How Yenzo scores

Sources (3)

Open Food Facts additives taxonomy (Yenzo's table cites no EFSA opinion for this code). Open Food Facts additives taxonomy, https://github.com/openfoodfacts/openfoodfacts-server/blob/main/taxonomies/additives.txt (entry en:e315)
Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 2A (mức sử dụng tối đa) và Phụ lục 3 (phụ gia và nhóm thực phẩm dùng theo GMP)
EFSA Journal (2016). Scientific Opinion on the re-evaluation of erythorbic acid (E 315) and sodium erythorbate (E 316) as food additives

Information only, not medical advice. The risk level is the additive's class in Yenzo's open scoring method, based on the cited source.