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

Examples of oxalic acid 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.
Still, new research into how natural compounds like oxalic acid may affect gadolinium buildup is helping scientists better understand why some people experience lingering effects. Stephanie Brown, Verywell Health, 14 Apr. 2025 Now the new study, led by UNM professor Brent Wagner, MD, has found a connection between gadolinium and oxalic acid, a molecule found in foods which binds with metal ions, leading to medical issues such as kidney stones. John W. Dean, MSNBC Newsweek, 7 Apr. 2025 The main ingredient is oxalic acid, which is found naturally in certain fruits and vegetables and can leave surfaces shiny and clean. Lisa Cericola, Southern Living, 10 Mar. 2025 Raw Potato Raw white potatoes contain oxalic acid, a common ingredient in most commercial rust removers. Nafeesah Allen, Better Homes & Gardens, 8 Feb. 2025 See All Example Sentences for oxalic acid

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

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Cite this Entry

“Oxalic acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oxalic%20acid. Accessed 22 Apr. 2025.

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

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