sodium hydroxide

noun

: 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

Removing them typically involves toxic reagents such as hydrofluoric acid, nitric acid, or sodium hydroxide. —IEEE Spectrum, 17 June 2024

By the mid-1980s, many manufacturers had removed sodium hydroxide from its relaxer ingredient list. —Linda Villarosa Robin Miles Krish Seenivasan Alec K. Redfearn, New York Times, 13 June 2024

These were allowed to oxidize in the air, after which they were dissolved in a sodium hydroxide solution, which left behind the copper wires. —John Timmer, Ars Technica, 4 June 2024

The writer cited, among other impacts the water and lands poisoned by the use of sulfuric acid and sodium hydroxide leaking into ground water and soil. —Shaun McKinnon, The Arizona Republic, 3 June 2024

Word History

First Known Use

1885, in the meaning defined above

Kids Definition

sodium hydroxide

noun

: a white brittle solid that is strongly alkaline and is used especially in making soap, rayon, and paper

Medical Definition

sodium hydroxide

noun

: 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