YenzoWhat is E264 (ammonium acetate)?
It is ammonium acetate, the ammonium salt of acetic acid, E264 in the acidity regulator group.
E264Ammonium acetate
E264 is ammonium acetate, the ammonium salt of acetic acid. In food it is used to adjust acidity, but it is very rare on the labels of packaged food.
- Code
- E264 · INS 264
- 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 low?Based on the Open Food Facts additives taxonomy
How E264 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, acidity regulator (264), dried onion and garlic, pepper, natural colour (160a).
acidity regulator (264)acidity regulator 264E264INS 264
Questions about ammonium acetate
Is ammonium acetate harmful?
The JECFA database (the FAO/WHO expert committee) records an evaluation from 1982: an ADI of “not specified”, meaning no numerical ADI is needed. JECFA noted that other ammonium salts and acetates had been given a group ADI of “not specified” and included ammonium acetate in the previously accepted groups.
Is E264 permitted in Vietnam?
Ammonium acetate (INS 264) is not listed in Appendix 1 (the list of additives permitted in food) of Circular 24/2019/TT-BYT. The acetates listed there are INS 261(i), 262(i), 262(ii) and 263.
Other acidity regulators
E260Acetic acidvery lowE261Potassium acetatesvery lowE262Sodium acetatesvery lowE263Calcium acetatevery lowE270Lactic acidvery lowE296Malic acidvery low
See all acidity regulators →Updated 23 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:e264)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 1
- JECFA (FAO/WHO) evaluation database: Ammonium acetate, INS 264