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 More than 20 years ago, a couple of Emory University researchers with a lot of time on their hands tried to dissolve Peeps in water, acetone, sulfuric acid and sodium hydroxide. al, "They’re an Easter staple, but what are Peeps made of?," 31 Mar. 2021 After watching all this, the Oldsmar plant operator quickly lowered the sodium hydroxide level and called his boss. Peter Elkind, ProPublica, "America’s Drinking Water Is Surprisingly Easy to Poison," 17 Mar. 2021 Olin Corp is a manufacturer of ammunition, chlorine, and sodium hydroxide. - Investing Reimagined, Forbes, "Top Stocks To Short Today As Bond Yields Keep Hurting Tech Stocks," 25 Feb. 2021 If ingested in large amounts, sodium hydroxide can cause vomiting, chest and abdominal pain, according to the Centers for Disease Control. Jeff Pegues, CBS News, "Feds tracking down hacker who tried to poison Florida town's water supply," 9 Feb. 2021 The cyberattack on the city of Oldsmar’s water treatment plant on Feb. 5 momentarily increased the amount of sodium hydroxide, or lye, added to the city’s water supply from 100 parts per million to 11,100 parts per million. Grant Gross, Washington Examiner, "Hacker attempts to poison Florida city’s water supply," 11 Feb. 2021 Within a few hours, the level of sodium hydroxide, the chemical compound known as lye that’s added to dissolve heavy metals, had increased to 100 times the usual amount. Alissa Walker, Curbed, "Could the Florida Water-Supply Hacking Happen in New York City?," 11 Feb. 2021 The hacker was controlling the computer system's mouse — opening various functions on the screen and changing the sodium hydroxide in the water supply from about 100 parts per million to more than 11,100 parts per million. Jeff Pegues, CBS News, "Feds tracking down hacker who tried to poison Florida town's water supply," 9 Feb. 2021 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

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

Time Traveler

The first known use of sodium hydroxide was in 1885

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Statistics for sodium hydroxide

Last Updated

7 Apr 2021

Cite this Entry

“Sodium hydroxide.” Dictionary, Merriam-Webster, Accessed 20 Apr. 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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