sodium hydroxide


Definition of sodium hydroxide

: a white brittle solid NaOH that is a strong caustic base used especially in making soap, rayon, and paper

Examples of sodium hydroxide in a Sentence

Recent Examples on the Web The heavy texture of relaxers smooth out curls while the sodium hydroxide breaks those disulfide bonds so the hair is permanently locked into a different, straighter form. Amber Rambharose, Allure, "The Science of Beauty: How to Take Care of Curly Hair," 10 Dec. 2020 Sappi North America's Somerset Mill designed and installed an innovative system that recovers used sodium hydroxide during boiler feed water preparation and repurposes caustic, according to the release. Arkansas Online, "Forestry operations in PB win accolades," 14 Nov. 2020 BioLab also stores sodium hydroxide, or caustic soda, at its Lake Charles facility, according to Jim Vallette, co-founder of Material Research, which works with nonprofit groups. Washington Post, "Wind, rain and a chemical fire. Hurricane Laura was gone but the crisis wasn’t over.," 28 Aug. 2020 The American manufacturer of ammunition, chlorine, and sodium hydroxide was founded in 1892. Fortune, "Earnings Per Share (Last Fiscal Year)," 1 July 2019 The bottle is charged for six minutes to electrolyze it, creating a solution that looks like water but is a mix of hypochlorous acid (a powerful disinfectant) and sodium hydroxide (which works as a detergent and cuts through grease). Janelle Nanos,, "A Burlington startup lets you make your own nontoxic cleaners at home," 20 June 2019 The liquid commonly used for unclogging sinks, tubs and other drains contains sodium hydroxide or lye, which can be used for dissolving organic matter. Washington Post, "Testimony: Suspect bought Drano after Chinese scholar death," 14 June 2019 This shouldn’t be surprising, given the ingredients in hair products, including formaldehyde (known carcinogen), toluene (neurological and developmental toxicant), sodium hydroxide (lye), and triphenyl phosphate (suspected endocrine disruptor). Longreads, "True Roots," 5 June 2019 Panicked, the lawsuit says, Traci Hall ran back into the restaurant and learned that an employee had filled her cup from a spigot that dispenses sodium hydroxide, a powerful solvent used to clean commercial cooking equipment. Jeanne Houck,, "Lawsuit: First Watch employee put degreaser in pregnant woman's drink," 14 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sodium hydroxide.' 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 sodium hydroxide

1885, in the meaning defined above

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Time Traveler for sodium hydroxide

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The first known use of sodium hydroxide was in 1885

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Statistics for sodium hydroxide

Last Updated

14 Dec 2020

Cite this Entry

“Sodium hydroxide.” Dictionary, Merriam-Webster, Accessed 16 Jan. 2021.

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More Definitions for sodium hydroxide

sodium hydroxide


Medical Definition of sodium hydroxide

: a white brittle deliquescent solid NaOH that dissolves readily in water to form a strongly alkaline and caustic solution and that is used in pharmacy as an alkalizing agent

called also caustic soda

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