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WordReference Random House Unabridged Dictionary of American English © 2024so′dium car′bonate, [Chem.]- ChemistryAlso called soda ash. an anhydrous, grayish-white, odorless, water-soluble powder, Na2CO3, usually obtained by the Solvay process and containing about 1 percent of impurities consisting of sulfates, chlorides, and bicarbonates of sodium: used in the manufacture of glass, ceramics, soaps, paper, petroleum products, sodium salts, as a cleanser, for bleaching, and in water treatment.
- ChemistryAlso called sal soda, soda, washing soda. the decahydrated form of this salt, Na2CO3·10H2O, used similarly.
- Chemistrythe monohydrated form of this salt, Na2CO3·H2O, used similarly, esp. in photography.
Collins Concise English Dictionary © HarperCollins Publishers:: sodium carbonate n - a colourless or white odourless soluble crystalline compound existing in several hydrated forms and used in the manufacture of glass, ceramics, soap, and paper and as an industrial and domestic cleansing agent. It is made by the Solvay process and commonly obtained as the decahydrate (washing soda or sal soda) or a white anhydrous powder (soda ash). Formula: Na2CO3
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