Benzoyl Peroxide (Flour Treatment)

Last reviewed October 19, 2026

In plain words: Benzoyl peroxide (INS 928) is a flour treatment and bleaching agent. It is used in bleached flour and products made with it in the US, and in flour it breaks down mainly to benzoic acid. It is not in the EU additive list and has no authorized E number.

Identity

Benzoyl peroxide (flour treatment). Number: INS 928; not in the EU additive list (no E number authorized). Function: flour treatment / bleaching agent. Typical foods: bleached flour and products made with it (US). What it is: a peroxide that breaks down mainly to benzoic acid in flour.

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This page is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 19, 2026.