The chemical name for HCO3 is the bicarbonate anion. It may also be called hydrogen carbonate or hydrogencarbonate. It is composed of one atom of hydrogen, one atom of carbon and three atoms of oxygen.
HCO3 is an anion that carries a total net charge of minus 1. It is used in the formation of many ionic compounds, such as ammonium bicarbonate. Bicarbonate has a molar mass of 61.01 grams per mole and an acidity of 10.3. It is a product of the photosynthesis of freshwater plants, and is commonly found in the compound sodium bicarbonate, also known as baking soda.