Quick Answer: Potassium bromate is banned in the EU, UK, Canada, Brazil, China, India, and many other countries due to its classification as a possible human carcinogen. It remains legal in the United States, where it is used as a flour treatment agent in bread and baked goods.
Potassium bromate is added to flour to strengthen dough and help bread rise higher. The IARC classifies it as a Group 2B carcinogen (possibly carcinogenic to humans) based on studies showing it causes kidney and thyroid tumors in rats. While the baking industry argues that bromate fully converts to harmless potassium bromide during baking, studies have found residual bromate in finished bread products. California requires a Proposition 65 warning on products containing potassium bromate. Several major US bakeries have voluntarily removed it, and King Arthur Flour has been bromate-free for decades. Bread labeled "bromated flour" or "enriched flour (potassium bromate)" contains this additive.
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Many commercial white breads, hamburger buns, and pizza dough in the US may contain potassium bromate. Check ingredient labels for "bromated flour" or "potassium bromate."
No. Potassium bromate (KBrO3) is a salt containing bromine. It's chemically distinct from elemental bromine, but the bromine component raises the safety concerns.
CheckIt AI. (2026). "Is Potassium Bromate Banned? — CheckIt AI". Climaverse PBC. Retrieved from https://getcheck.it/answers/is-potassium-bromate-banned"Is Potassium Bromate Banned? — CheckIt AI." CheckIt AI, Climaverse PBC, 2026-03-05. https://getcheck.it/answers/is-potassium-bromate-banned.<a href="https://getcheck.it/answers/is-potassium-bromate-banned">Is Potassium Bromate Banned? — CheckIt AI — CheckIt AI</a>@misc{checkit2026answersispotassiumbromatebanned,
title = {Is Potassium Bromate Banned? — CheckIt AI},
author = {CheckIt AI},
year = {2026},
publisher = {Climaverse PBC},
url = {https://getcheck.it/answers/is-potassium-bromate-banned},
note = {Retrieved 2026-03-05}
}