oxalic acid

noun

ox·​al·​ic acid (ˌ)äk-ˈsa-lik- How to pronounce oxalic acid (audio)
: a poisonous strong acid (COOH)2 or H2C2O4 that occurs in various plants (such as spinach) as oxalates and is used especially as a bleaching or cleaning agent and as a chemical intermediate

Example Sentences

Recent Examples on the Web Thymol, and other naturally occurring miticides like oxalic acid, formic acid and hops, are used in current treatments in the form of strips or trays that go inside the hive. Michelle Cohan, CNN, 17 Nov. 2022 While there is no scent listed, the formula does contain oxalic acid, so keep it away from your eyes. Maya Polton, Better Homes & Gardens, 24 Oct. 2022 The fungus infecting chestnut trees thrives by secreting a chemical called oxalic acid, which kills cells and allows the pathogen to feast on the dead tissue. BostonGlobe.com, 30 Aug. 2022 But the approval of the most efficacious methods for application of oxalic acid is tied up in bureaucratic delay. Steven Savage, Forbes, 30 Apr. 2022 To compare this new treatment to oxalic acid, a common chemical used by small-scale beekeepers, the researchers then treated 30 colonies with either the acid or the fungus. Erik Stokstad, Science | AAAS, 4 June 2021 For windows and shower doors, McDermott suggests gently buffing the stains with a rag and an oxalic acid cleanser, such as Bar Keepers Friend ($7.85, Amazon). Washington Post, 10 June 2021 Bees can fall sick or die if concentrations of oxalic acid are too high, and other chemical miticides can cause reproductive problems in the pollinators. Erik Stokstad, Science | AAAS, 4 June 2021 Dissolving them in salt water or ammonium sulfate solutions, and then precipitating them out with oxalic acid or ammonium bicarbonate – inexpensive chemicals – does the trick. Willy Shih, Forbes, 24 Feb. 2021 See More

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

Word History

Etymology

French (acide) oxalique, from Latin oxalis

First Known Use

1788, in the meaning defined above

Time Traveler
The first known use of oxalic acid was in 1788

Dictionary Entries Near oxalic acid

Cite this Entry

“Oxalic acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oxalic%20acid. Accessed 3 Dec. 2022.

Medical Definition

oxalic acid

noun

ox·​al·​ic acid (ˌ)äk-ˌsal-ik- How to pronounce oxalic acid (audio)
: a poisonous strong acid (COOH)2 or H2C2O4 that occurs in various plants as oxalates and is used especially as a bleaching or cleaning agent and as a chemical intermediate

More from Merriam-Webster on oxalic acid

Last Updated: - Updated example sentences
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