hydrogen peroxide


Definition of hydrogen peroxide

: an unstable compound H2O2 used especially as an oxidizing and bleaching agent, an antiseptic, and a propellant

Examples of hydrogen peroxide in a Sentence

Recent Examples on the Web Use products with carbamide peroxide (instead of hydrogen peroxide). Adam Hurly, Robb Report, 10 Dec. 2021 For this, the hydrogen peroxide should be a 1.5%-2% concentration. Nayeli Lomeli, USA TODAY, 11 Aug. 2021 Wait a few minutes, then blot up the hydrogen peroxide and remaining blood with a white cotton cloth or paper towels. Brett Martin, Popular Mechanics, 9 Apr. 2021 Each strip has the active ingredient hydrogen peroxide and is applied once a day for two weeks, for an hour each time. Hanna Horvath, NBC News, 14 Jan. 2021 Add 1 ounce of molasses per gallon of spray. Treat black spot and powdery mildew with hydrogen peroxide, and see the Organic Rose Program on dirtdoctor.com. Howard Garrett, Dallas News, 23 Aug. 2021 The chemical reaction also lowers the pH — increasing the acidity — and produces hydrogen peroxide, which prevents microbes from growing but can become toxic at high levels. Berly Mccoy, Smithsonian Magazine, 25 Oct. 2021 Some of this iron bunches together and reacts with naturally occurring hydrogen peroxide to produce hydroxyl radicals—highly reactive molecules that can harm cells. Nikk Ogasa, Scientific American, 18 Oct. 2021 And inhaling hydrogen peroxide could take your breath away in a bad way. Bruce Y. Lee, Forbes, 2 Oct. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hydrogen 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 hydrogen peroxide

1872, in the meaning defined above

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Time Traveler for hydrogen peroxide

Time Traveler

The first known use of hydrogen peroxide was in 1872

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Dictionary Entries Near hydrogen peroxide

hydrogen oxide

hydrogen peroxide

hydrogen selenide

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Statistics for hydrogen peroxide

Last Updated

11 Jan 2022

Cite this Entry

“Hydrogen peroxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrogen%20peroxide. Accessed 18 Jan. 2022.

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More Definitions for hydrogen peroxide

hydrogen peroxide


English Language Learners Definition of hydrogen peroxide

: a liquid that is used to make things lighter in color or to kill bacteria

hydrogen peroxide


Kids Definition of hydrogen peroxide

: a liquid chemical containing hydrogen and oxygen and used for bleaching and as an antiseptic

hydrogen peroxide


Medical Definition of hydrogen peroxide

: an unstable compound H2O2 used especially as an oxidizing and bleaching agent and as an antiseptic

More from Merriam-Webster on hydrogen peroxide

Nglish: Translation of hydrogen peroxide for Spanish Speakers

Britannica.com: Encyclopedia article about hydrogen peroxide


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