YenzoIs Potassium fumarate (INS 366) permitted in Vietnam?
Potassium fumarate (INS 366) is not listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food, nor in Appendix 2B.
E366Potassium fumarate
E366 is potassium fumarate, the potassium salt of fumaric acid. In food it is used as an acidity regulator.
- Code
- E366 · INS 366
- Group
- Acidity regulator
In VietnamNot on Vietnam's list of permitted additivesNot on Vietnam's list of permitted additives (Circular 24/2019); it may be used only in a product whose declaration is registered with the Vietnam Food Administration
Risk level on the Yenzo Scalevery lowBased on the Open Food Facts additives taxonomy
How E366 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, acidity regulator (366), dried onion and garlic, pepper, natural colour (160a).
acidity regulator (366)acidity regulator 366E366INS 366
Questions about potassium fumarate
Other acidity regulators
E357Potassium adipatevery lowE363Succinic acidvery lowE364Sodium succinatesvery lowE365Sodium fumaratevery lowE367Calcium fumaratevery lowE3701,4-Heptonolactonevery low
See all acidity regulators →Updated 21 October 2026
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:e366)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 1
- 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)