SINCE 1828
sodium carbonate
nounDefinition of sodium carbonate
: a sodium salt of carbonic acid used especially in making soaps and chemicals, in water softening, in cleaning and bleaching, and in photography: such as
a
: a hygroscopic crystalline anhydrous strongly alkaline salt Na2CO3
b
: the transparent crystalline hydrate Na2CO3·10H2O found in nature as natron
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