benzoyl peroxide

noun

: a colorless to white crystalline compound C₁₄H₁₀O₄ that is used as a bleaching agent (as for whitening flour), as a catalyst for the synthesis of polymers (such as polystyrene), and medically as an antibacterial and keratolytic agent especially for the topical treatment of acne

Examples of benzoyl peroxide in a Sentence

Recent Examples on the Web

It's formulated with benzoyl peroxide and boasts antimicrobial properties that clear zits and prevent future breakouts. —Kiana Murden, Vogue, 19 Dec. 2024

Providers often combine this with benzoyl peroxide for maximum benefit.6 Other prescriptions use the same ingredients as OTC products but in higher concentrations. —Brandi Jones, Msn-Ed, Health, 8 Dec. 2024

So, strong actives like salicylic acid, benzoyl peroxide, and tea tree oil are likely too harsh and can irritate the bump even more. —Jenna Ryu, SELF, 1 Nov. 2024

Henry agrees and adds parabens, sulfates, any forms of retinoids or retinol, benzoyl peroxide, and other harsh exfoliants to the list of things to avoid. —Audrey Noble, Vogue, 23 Oct. 2024

Word History

First Known Use

1867, in the meaning defined above

Kids Definition

benzoyl peroxide

noun

ben·​zo·​yl peroxide

ˈben-zə-ˌwil-,

-ˌzȯil-

: a white crystalline compound used in bleaching and in medicine especially in the treatment of acne

Medical Definition

benzoyl peroxide

noun

: a white crystalline flammable compound C₁₄H₁₀O₄ used in bleaching and in medicine especially in the treatment of acne

Note: Benzoyl peroxide is marketed the trademark Epiduo when used in combination with adapalene.