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

Its ingredients may include benzoyl peroxide, glycolic acid, salicylic acid, or tea tree oil.7 Wet your face with lukewarm water and gently apply the face wash in a circular motion using your fingertips. —Cristina Mutchler, Verywell Health, 9 June 2025

This has sparked concern among dermatologists and consumers alike, prompting many to question whether or not benzoyl peroxide in skin care is safe. —Leslie Baumann, Miami Herald, 16 Apr. 2025

However, Benzene can be found in these types of products when benzoyl peroxide breaks down at elevated temperatures, sometimes during storage and transportation. —Sari Hitchins, Parents, 14 Mar. 2025

Benzene, a chemical used in dyes, detergents, and some plastics, was found in the acne products, raising concerns about elevated levels of benzene in certain acne products containing benzoyl peroxide. —Alex Perry, Cincinnati Enquirer, 13 Mar. 2025

Word History

First Known Use

1867, in the meaning defined above

Rhymes for benzoyl peroxide

• acetaldehyde
• acetanilide
• arabinoside
• cycloheximide
• cyclophosphamide
• diethylamide
• dinucleotide
• ferricyanide
• ferrocyanide
• glutaraldehyde
• glyceraldehyde
• hydroperoxide

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.