Section 06 Products of the chemical or allied 28 Inorganic chemicals; organic or inorganic compounds of precious metals, of rare earth metals, of radioactive elements or isotopes 28 03 Carbon (carbon blacks and other forms of carbon not elsewhere specified or included) 28 03 00 Carbon (carbon blacks and other forms of carbon not elsewhere specified or included). Commodity Code Description 28 03 00 00 Carbon (carbon blacks and other forms of carbon not elsewhere specified or included).