E503ii - Ammonium hydrogen carbonate
What it is and how it is used
Ammonium Bicarbonate is an inorganic compound with formula -NH4-HCO3, simplified to NH5CO3. Ammonium bicarbonate is used in the food industry as a raising agent for flat baked goods, such as cookies and crackers, and in China in steamed buns and Chinese almond cookies. It was commonly used in the home before modern day baking powder was made available.
Source
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