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 The typical response to a breakout is swift and Pavlovian: See a bump, blast it with benzoyl peroxide or salicylic acid. Lexi Novak, Allure, "Here’s What’s Really Causing That Breakout on Your Chin," 25 Mar. 2018 Salicylic acid and benzoyl peroxide are also common treatments for acne-prone skin. Sara Delgado, Teen Vogue, "Iris Law Opened Up About How She Deals With Cystic Acne," 24 Oct. 2019 My skincare routine started in my pre-teen years after a few too many pimples led to a daily application of blemish-fighting products powered by benzoyl peroxide. Braelyn Wood,, "Tatcha Water Cream Changed My Opinion on Moisturizer—And It’s on Sale Right Now," 17 Oct. 2019 Also, watch out for over-the-counter acne products with benzoyl peroxide, which can cause irritation, and things that contain a lot of alcohol. Baze Mpinja, Marie Claire, "6 Things Women With Sensitive Skin Should Know," 22 Mar. 2019 Also look for products with benzoyl peroxide to kill pimple-causing bacteria and retinoids to prevent skin cells from clogging in the first place. Caroline Picard, Good Housekeeping, "The 5 Best Benefits of Aloe Vera Gel, According to Dermatologists," 8 July 2019 Retinoids, benzoyl peroxide, azelaic acid, and oral antibiotics may also be useful, and your dermatologist can help put together a skin-care regimen that makes sense for you. Jenn Sinrich, SELF, "12 Common Face 'Bumps' and How to Deal With Them," 31 May 2019 These skin care essentials are formulated with proven ingredients, like salicylic acid and benzoyl peroxide. Teen Vogue, "The 13 Best Acne Products on Amazon," 23 Apr. 2019 For example, for those with acne-prone skin, start with the Charcoal Balancing Mask ($18) to purge pores of dirt, oil, and gunk, and then spot-treat with the Blemish Control Spot Treatment ($22), which is made with five percent benzoyl peroxide. Lauren Swanson, Allure, "Amazon Launches Its First-Ever Skin-Care Line Today — and Everything's Under $40," 20 Mar. 2019

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.

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First Known Use of benzoyl peroxide

1867, in the meaning defined above

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Time Traveler for benzoyl peroxide

Time Traveler

The first known use of benzoyl peroxide was in 1867

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Statistics for benzoyl peroxide

Last Updated

29 Nov 2019

Cite this Entry

“Benzoyl peroxide.” The Dictionary, Merriam-Webster Inc., Accessed 6 December 2019.

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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.

Comments on benzoyl peroxide

What made you want to look up benzoyl peroxide? Please tell us where you read or heard it (including the quote, if possible).


very cautious or careful

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