USPUSP-NF
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Sodium Carbonate
Soda Ash Na2CO3 Formula wt, anhydrous 105.99
 Na2CO3·H2O Formula wt, monohydrate 124.00
 Na2CO3·10H2O Formula wt, decahydrate 286.14
 500(i) [497-19-8] [5968-11-6] [6132-02-1] 45P3261C7T sodium carbonate

DESCRIPTION

Sodium Carbonate occurs as colorless crystals or as a white, granular or crystalline powder. It is anhydrous or may contain 1 or 10 molecules of water of hydration. It is freely soluble in water and insoluble in ethanol. Its solutions are alkaline to litmus. The anhydrous salt is hygroscopic, and the two hydrates are efflorescent. The decahydrate melts at about 32°.

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