Potassium bicarbonate is a white, crystalline, slightly alkaline and salty substance. It is produced by the passage of carbon dioxide through an aqueous potassium carbonate solution. It is used in medicine as an antacid. It is registered in the FDA under the section of suitable, safe and effective ingredients for OTC antacids. This FDA denomination classifies potassium bicarbonate as a GRAS ingredient.

Potassium bicarbonate can be used as a raw material for the production of potassium carbonate, potassium acetate and potassium arsenite in chemical production. It is also used in fire extinguishing agents for petroleum and chemicals. In addition, it can be applied in medicine and used as baking powder in the food industry.