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sodium hydroxide

noun

Chemistry.
  1. a white, deliquescent, water-soluble solid, NaOH, usually in the form of lumps, sticks, chips, or pellets, that upon solution in water generates heat: used chiefly in the manufacture of other chemicals, rayon, film, soap, as a laboratory reagent, and in medicine as a caustic.


sodium hydroxide

noun

  1. a white deliquescent strongly alkaline solid used in the manufacture of rayon, paper, aluminium, soap, and sodium compounds. Formula: NaOH Also calledcaustic soda See also lye
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

sodium hydroxide

  1. A white, corrosive, solid compound that absorbs water and carbon dioxide from the atmosphere and forms lye when in solution. Sodium hydroxide is toxic and strongly alkaline and is used to make chemicals and soaps and to refine petroleum. Chemical formula: NaOH.
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Word History and Origins

Origin of sodium hydroxide1

First recorded in 1880–85
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Compare Meanings

How does sodium hydroxide compare to similar and commonly confused words? Explore the most common comparisons:

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Example Sentences

In the next stage, the pulp is treated with a number of chemicals, including carbon disulphide, to make it soluble in sodium hydroxide.

Monday in the area of Low Line and Magnolia roads in Morgan County and the nine derailed cars contained dry cement, calcium chloride and sodium hydroxide, according to CSX and county officials.

The Met's Cdr Jon Savell said a laboratory analysis of the substance from the attack site found it was a "very strong concentrated corrosive substance, either liquid sodium hydroxide or liquid sodium carbonate".

From BBC

He is leading a project to study the effects of pouring tons of alkaline sodium hydroxide into the ocean off the New England coast.

In UPM's new mill the wood is chipped, then boiled with sodium hydroxide and sodium sulphide at high pressure.

From BBC

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sodium hydrosulfitesodium hypochlorite