Hydrogen carbonate is a chemical compound that is commonly known as bicarbonate or baking soda. Bicarbonate is an anion that contains one hydrogen, one carbon, and three oxygen atoms. It can be produced by reacting carbon dioxide gas with water, and is used in various applications including baking, cleaning and medical treatments. Other synonyms for hydrogen carbonate include sodium bicarbonate, which is common in cooking and is also used as an antacid, and potassium bicarbonate, which is used as a pH regulator in the food industry. Other synonyms include sodium hydrogen carbonate, ammonium bicarbonate, and calcium bicarbonate, which all have their own unique properties and applications.