YenzoWhat is E628 (dipotassium guanylate)?
E628 is dipotassium guanylate. In Appendix 1 of Circular 24/2019/TT-BYT the functions listed for it are flavour enhancer.
E628Dipotassium guanylate
E628 is dipotassium guanylate (dikali guanylat). In Appendix 1 of Circular 24/2019/TT-BYT its function is flavour enhancer.
- Code
- E628 · INS 628
- Group
- Flavour enhancer
In Vietnam✓ PermittedOn the list of permitted additives — Circular 24/2019, Appendix 1
Risk level on the Yenzo Scalelow?Based on the Open Food Facts additives taxonomy
How E628 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, flavour enhancer (628), dried onion and garlic, pepper, natural colour (160a).
flavour enhancer (628)flavour enhancer 628E628INS 628On Vietnamese labels: Dikali 5'-guanylat
Dipotassium guanylate in food
Salt substitutes
Questions about dipotassium guanylate
Is dipotassium guanylate harmful?
The JECFA database (the FAO/WHO expert committee) records an ADI of “not specified” (no numerical ADI is needed) for dipotassium 5'-guanylate, evaluated in 1985; this is a group ADI for guanylic acid and its calcium, disodium and dipotassium salts.
Is INS 628 permitted in Vietnam?
Yes. Dipotassium guanylate (INS 628) is listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food, with the function flavour enhancer.
Other flavour enhancers
E625Magnesium diglutamatelowE626Guanylic acidlowE627Disodium guanylatelowE629Calcium guanylatelowE630Inosinic acidlowE631Disodium inosinatelow
See all flavour enhancers →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:e628)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 2A: mức sử dụng tối đa phụ gia trong thực phẩm
- JECFA (FAO/WHO) evaluation database: Dipotassium 5'-guanylate, INS 628