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 Retinoids, benzoyl peroxide, azelaic acid, and oral antibiotics (which will require a prescription) may also be useful. Jenn Sinrich, SELF, "12 Reasons Why You Might Have Small 'Bumps' on Your Face," 30 Dec. 2020 Use benzoyl peroxide to get to the root of the issue. Dori Price, Good Housekeeping, "How to Get Rid of Blackheads, According to Skincare Pros and Dermatologists," 1 Dec. 2020 Another effective and slightly more powerful option for blackheads is benzoyl peroxide, also popular in cleansers like CeraVe Acne Foaming Cream Cleanser. Dori Price, Good Housekeeping, "How to Get Rid of Blackheads, According to Skincare Pros and Dermatologists," 1 Dec. 2020 If benzoyl peroxide is too drying, apply a salicylic acid wash instead, Dr. Gymrek suggests. Dori Price, Good Housekeeping, "How to Get Rid of Blackheads, According to Skincare Pros and Dermatologists," 1 Dec. 2020 Palep says to look for products with retinoids, benzoyl peroxide, and alpha hydroxy acids. Bella Cacciatore, Glamour, "Everything You Need to Know About Hormonal Acne," 24 Nov. 2020 Your doctor may prescribe you them in conjunction with another topical treatment such as one containing benzoyl peroxide or a retinoid such as Retin-A. Kristin Koch, Seventeen, "30 Dermatologist-Tested Tips for Getting Rid of Acne, Like, REALLY Fast," 1 Aug. 2020 Whiteheads and blackheads, for example, are often treated via a retinoid or benzoyl peroxide, azelaic acid, or salicylic acid. Leah Groth,, "A TikTok User Says Aspirin Face Masks Got Rid of Her Acne—But How Safe Is This?," 14 Sep. 2020 NBC News Shoppers seem to like this spot treatment by Neutrogena, which works to fight acne and includes 10-percent benzoyl peroxide acne medication. NBC News, "September reader favorites: Air purifiers, face masks and more," 2 Oct. 2020

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.

See More

First Known Use of benzoyl peroxide

1867, in the meaning defined above

Keep scrolling for more

Learn More about benzoyl peroxide

Time Traveler for benzoyl peroxide

Time Traveler

The first known use of benzoyl peroxide was in 1867

See more words from the same year

Statistics for benzoyl peroxide

Last Updated

17 Jan 2021

Cite this Entry

“Benzoyl peroxide.” Dictionary, Merriam-Webster, Accessed 22 Jan. 2021.

Keep scrolling for more

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).


Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!