YenzoWhat is E634 (calcium 5'-ribonucleotides)?
Appendix 1 of Circular 24/2019/TT-BYT lists the function of Calcium 5'-ribonucleotides (INS 634) as: flavour enhancer.
E634Calcium 5'-ribonucleotides
E634 is Calcium 5'-ribonucleotides. Appendix 1 of Circular 24/2019/TT-BYT lists its function as flavour enhancer.
- Code
- E634 · INS 634
- 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 E634 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, flavour enhancer (634), dried onion and garlic, pepper, natural colour (160a).
flavour enhancer (634)flavour enhancer 634E634INS 634On Vietnamese labels: Calci 5'-ribonucleotid
Calcium 5'-ribonucleotides in food
Fermented vegetables
Dried pasta and noodles
Salt substitutes
Questions about calcium 5'-ribonucleotides
Is calcium ribonucleotide harmful?
JECFA (1974) listed the ADI of calcium 5'-ribonucleotides as "not specified", meaning no numerical ADI was needed.
Is E634 permitted in Vietnam?
Yes. Calcium 5'-ribonucleotides (INS 634) is listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food.
Other flavour enhancers
E629Calcium guanylatelowE630Inosinic acidlowE631Disodium inosinatelowE632Dipotassium inosinatelowE633Calcium inosinatelowE635Disodium 5'-ribonucleotideslow
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:e634)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 2A
- JECFA database (WHO): Calcium 5'-ribonucleotides, INS 634, evaluation 1974