sodium bicarbonate


From The Collaborative International Dictionary of English v.0.48:

Sodium bicarbonate \Sodium bicarbonate\,
   a white crystalline substance, HNaCO3, with a slight
   alkaline taste resembling that of sodium carbonate. It is
   found in many mineral springs and also produced
   artificially,. It is used in cookery, in baking powders, and
   as a source of carbonic acid gas (carbon dioxide) for soda
   water. Called also baking soda, cooking soda,
   bicarbonate of soda, bicarb, saleratus, and
   technically, acid sodium carbonate, {sodium acid
   carbonate}, primary sodium carbonate, sodium dicarbonate,
   etc.
   [1913 Webster]
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