benzoyl peroxide


Definition of benzoyl peroxide

: 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 Their Acne Foaming Cream cleanser targets the root cause of acne and blackheads through benzoyl peroxide. Grooming Playbook, The Salt Lake Tribune, 11 May 2022 Instead, use benzoyl peroxide at night and vitamin C in the morning, or use them on different days—they just shouldn’t be layered onto your skin at the same time. Sarah Jacoby, SELF, 28 Apr. 2022 Salicylic acid, coconut oil, vitamin E and benzoyl peroxide are among some of the others to avoid. Grooming Playbook, The Salt Lake Tribune, 7 Apr. 2022 Also, beware of using benzoyl peroxide with other actives in your leave-on products like moisturizers or serums. Nateisha Scott, Allure, 19 Mar. 2022 Unlike some acne treatments (including retinoids and benzoyl peroxide), azelaic acid is generally considered safe to use during pregnancy. Sarah Jacoby, SELF, 22 Mar. 2022 Drying toners, astringents, and cleansers will also dry out skin when used with retinol, and benzoyl peroxide will make the retinol less effective. Rachel Nussbaum,, 9 Dec. 2021 The ingredients in topical acne treatments may include retinoids, benzoyl peroxide, antibiotics, or salicylic acid. Sarah Jacoby, SELF, 27 Dec. 2021 Even more, it is packed with ceramides, squalane, and benzoyl peroxide to refine pores and strengthen the skin barrier. Kiana Murden, Vogue, 4 Feb. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'benzoyl peroxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of benzoyl peroxide

1867, in the meaning defined above

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The first known use of benzoyl peroxide was in 1867

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Last Updated

17 May 2022

Cite this Entry

“Benzoyl peroxide.” Dictionary, Merriam-Webster, Accessed 19 May. 2022.

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More Definitions for benzoyl peroxide

benzoyl peroxide


Medical Definition of benzoyl peroxide

: 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.


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