Baking soda is sodium bicarbonate i.e. NaHCO3.
Baking soda is the common name of sodium bicarbonate. The chemical formula of baking soda is NaHCO3. Sodium bicarbonate or Sodium hydrogen carbonate has a monoclinic crystalline structure. Sodium bicarbonate molecules feature one sodium cation and one bicarbonate anion. Here, an ionic bond is formed between the positively charged sodium ion and the negatively charged oxygen.