<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> Sodium bicarbonate (IUPAC name: sodium hydrogen carbonate), commonly known as baking soda, is a chemical compound with the formula Na HCO . It is a salt composed of sodium ions and bicarbonate ions . Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder . It has a slightly salty, alkaline taste resembling that of washing soda (sodium carbonate). The natural mineral form is nahcolite . It is a component of the mineral natron and is found dissolved in many mineral springs . It is among the European Union - encoded food additives, identified as E 500 . </P> <P> Because it has long been known and is widely used, the salt has many related names such as baking soda, bread soda, cooking soda, and bicarbonate of soda . In colloquial usage, the names sodium bicarbonate and bicarbonate of soda are often truncated; forms such as sodium bicarb, bicarb soda, bicarbonate, and bicarb are common . The word saleratus, from Latin sal æratus meaning "aerated salt", was widely used in the 19th century for both sodium bicarbonate and potassium bicarbonate . </P>

What is the chemical formula for sodium bicarbonate
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