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 But sodium hydroxide is only highly caustic or corrosive in high doses, Dr. Christopher Holstege, a medical toxicologist at the University of Virginia, told USA TODAY. Sudiksha Kochi, USA TODAY, 21 Mar. 2022 There are 10 manufacturing plants in the United States that still use asbestos to make chlorine and sodium hydroxide, but EPA officials said their reliance on this technology has declined over time. Anna Phillips, Anchorage Daily News, 5 Apr. 2022 One of the chemicals commonly used in soaps and detergents is sodium hydroxide, also known as lye and caustic soda. Phil Diehl, San Diego Union-Tribune, 25 Mar. 2022 Consider what happened in February when a hacker infiltrated the city water system in Oldsmar, Florida, and attempted to raise the level of sodium hydroxide from 100 parts per million to a lethal 11,100 parts per million. Dan Mondor, Forbes, 21 Sep. 2021 In February, someone tried to poison a Florida city's water supply by hacking into its control system and dramatically increasing the amount of sodium hydroxide. Brian Barrett, Wired, 16 Oct. 2021 Manufacturers get chlorine gas as a byproduct of the process that makes sodium hydroxide. Ron Hurtibise,, 26 Apr. 2021 Back in February, a hacker breached a water treatment facility (paywall) in Florida and used their access to manipulate connected devices to increase the sodium hydroxide in the water to dangerous, poisonous levels. Yash Prakash, Forbes, 25 June 2021 Someone broke into the plant’s computer system and changed the level of sodium hydroxide, also known as lye, from about 100 parts per million to 11,100 parts per million, Pinellas County Sheriff Bob Gualtieri said. Kate Santich,, 23 July 2021 See More

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.

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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Dictionary Entries Near sodium hydroxide

sodium hydrosulfite

sodium hydroxide

sodium hypochlorite

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Statistics for sodium hydroxide

Last Updated

1 May 2022

Cite this Entry

“Sodium hydroxide.” Dictionary, Merriam-Webster, Accessed 21 May. 2022.

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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

More from Merriam-Webster on sodium hydroxide Encyclopedia article about sodium hydroxide


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