Section 06 Products of the chemical or allied industries 28 Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or isotopes 28 36 Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate. 28 36 30 Sodium hydrogencarbonate (sodium bicarbonate) 28 36 30 00 Sodium hydrogencarbonate (sodium bicarbonate) Commodity Code Description 28 36 30 00 000 Sodium hydrogencarbonate (sodium bicarbonate)