YenzoWhat is E527 (ammonium hydroxide)?
According to Appendix 1 of Circular 24/2019/TT-BYT, ammonium hydroxide (INS 527) has the function acidity regulator.
E527Ammonium hydroxide
E527 is ammonium hydroxide. In Appendix 1 of Circular 24/2019/TT-BYT it has the function acidity regulator.
- Code
- E527 · INS 527
- 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 E527 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, acidity regulator (527), dried onion and garlic, pepper, natural colour (160a).
acidity regulator (527)acidity regulator 527E527INS 527On Vietnamese labels: Amoni hydroxyd
Questions about ammonium hydroxide
Is ammonium hydroxide harmful?
The FAO/WHO expert committee JECFA last evaluated ammonium hydroxide in 1965 and recorded the ADI as “not limited”. This is a JECFA conclusion, not an EFSA one; the JECFA summary gives no intake figures.
Is E527 permitted in Vietnam?
Yes. Ammonium hydroxide (INS 527) is listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food.
Other acidity regulators
E524Sodium hydroxidevery lowE525Potassium hydroxidevery lowE526Calcium hydroxidevery lowE528Magnesium hydroxidevery lowE529Calcium oxidevery lowE530Magnesium oxidevery 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:e527)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 1
- JECFA (FAO/WHO), Summary of Evaluations: Ammonia solution (INS 527)