chlorine dioxide

noun

: a heavy reddish-yellow gas ClO2 used especially as a bleach and disinfectant

Examples of chlorine dioxide in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
There currently are no warnings about chlorine dioxide on a consumer page on the FDA website. Megan O’Matz, ProPublica, 18 Feb. 2026 The agency ended by noting that there’s a wide variety of other bogus products and claims, including raw camel milk, MMS (chlorine dioxide), and essential oils. Beth Mole, ArsTechnica, 13 Jan. 2026 But that hasn't prevented Johnson, who has been lambasted for spreading misinformation in the past, from supporting the discredited doctor's claims that chlorine dioxide, a chemical used for disinfecting and bleaching, can help treat autism, COVID, cancer and a host of other ailments. Phillip M. Bailey, USA Today, 13 Dec. 2025 Most modern manufacturers bleach white office paper with chlorine dioxide, which creates fewer byproducts than chlorine bleach and breaks down quickly.1 Some use entirely chlorine-free methods for bleaching. Brandee Gruener, Southern Living, 30 Apr. 2025 See All Example Sentences for chlorine dioxide

Word History

First Known Use

1878, in the meaning defined above

Time Traveler
The first known use of chlorine dioxide was in 1878

Browse Nearby Words

Cite this Entry

“Chlorine dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chlorine%20dioxide. Accessed 6 Apr. 2026.

More from Merriam-Webster on chlorine dioxide

Love words? Need even more definitions?

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

More from Merriam-Webster