The why
Clean & Clear Persa-Gel 10. 10% benzoyl peroxide, maximum OTC strength. Valisure FDA Citizen Petition #8 (March 2024) found BPO can decompose into benzene, a known human carcinogen, under heat over time; Clean & Clear was among the brands named. Floor 7 reflects benzene-formation risk at max strength. Ingredients verified 06 2026.