YenzoWhat is E355 (adipic acid)?
Appendix 1 of Circular 24/2019/TT-BYT lists one function for adipic acid: acidity regulator.
E355Adipic acid
E355 is adipic acid, an organic acid. In food it adds sourness and adjusts acidity.
Did you know? Appendix 2A of Circular 24/2019/TT-BYT has a single entry for adipic acid (INS 355): fermented milk heat-treated after fermentation, at most 1,500 mg/kg, expressed as adipic acid.
- Code
- E355 · INS 355
- Group
- Acidity regulator
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 E355 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, acidity regulator (355), dried onion and garlic, pepper, natural colour (160a).
acidity regulator (355)acidity regulator 355E355INS 355On Vietnamese labels: Acid adipic
Adipic acid in food
Questions about adipic acid
Is INS 355 harmful?
In 1977 the FAO/WHO expert committee JECFA set a group ADI of 0–5 mg/kg body weight per day for adipic acid and its potassium, sodium and ammonium salts. This is a JECFA evaluation, not an EFSA one.
Is Adipic acid permitted in Vietnam?
Yes. Adipic acid (INS 355) is listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food.
Other acidity regulators
E351Potassium malatevery lowE352Calcium malatesvery lowE353Metatartaric acidvery lowE354Calcium tartratevery lowE356Sodium adipatevery lowE357Potassium adipatevery low
See all acidity regulators →Updated 21 October 2026
Sources (4)
- 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:e355)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 2A: nhóm thực phẩm được phép dùng INS 355
- JECFA evaluation summary: Adipic acid (INS 355) (IPCS INCHEM, WHO/FAO)
- Regulation (EC) No 1333/2008 on food additives (consolidated text of 18.08.2026): Article 16 and Annex II, Part E, category 13.1 (foods for infants and young children)