YenzoWhat is E924a (potassium bromate)?
In Yenzo's data, E924a (INS 924a) is Potassium bromate.
E924aPotassium bromate
E924a is Potassium bromate. INS 924a is not in Appendix 1 of Circular 24/2019/TT-BYT, so this page does not yet state a Vietnamese rule for it.
Did you know? JECFA withdrew the previously acceptable level of flour treatment with potassium bromate (1992 evaluation).
- Code
- E924a · INS 924a
In Vietnam✕ Not permitted in VietnamNot 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 Scalehigh?Based on JECFA's evaluation
How E924a appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, flour treatment agent (924a), dried onion and garlic, pepper, natural colour (160a).
flour treatment agent (924a)flour treatment agent 924aE924aINS 924a
Questions about potassium bromate
Is potassium bromate harmful?
JECFA (1992, reaffirmed in 1995 in light of new data on residual bromate in bread) concluded that the use of potassium bromate as a flour treatment agent "is not acceptable".
Is E924a permitted in Vietnam?
INS 924a was not found in Appendix 1 of Circular 24/2019/TT-BYT (consolidated 09/VBHN-BYT). The page draws no conclusion on the rule for E924a.
Other flour treatment agents
E529Calcium oxidevery lowE920L-Cysteinevery lowE924Bromates (flour treatment agent)highE927bCarbamide (urea)lowE1100Amylasevery lowE1101Protease, invertase and papainvery low
See all flour treatment agents →Updated 22 October 2026