Sodium bicarbonate is a chemical compound with the formula NaHCO. 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.Formula: NaHCO3Molar mass: 84.007 gmolIUPAC ID: Sodium hydrogen carbonateDensity: 2.2 gcmSoluble in: Water