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

Over-the-Counter Acne Products Over-the-counter (OTC) acne products like topical salicylic acid or benzoyl peroxide often indicate they should not be used on the lips or around the mouth. —Ann Pietrangelo, Verywell Health, 1 Oct. 2024

Doctors say to avoid are retinol (including tretinoin), salicylic acid, benzoyl peroxide, hydrocortisone (in the first trimester), chemical sunscreens, hydroquinone, and tetracycline during pregnancy. —Katie Becker, Vogue, 1 Oct. 2024

CeraVe Acne Foaming Cream Wash gives you the cream format with the power of benzoyl peroxide to help clear and prevent breakouts and ceramides prevent overdrying without clogging pores. —Allure, 26 Sep. 2024

Like benzoyl peroxide, topical retinoids can also be strong and irritating. —Jenna Ryu, SELF, 16 Aug. 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.