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 30 Sulphides; polysulphides, whether or not chemically defined 28 30 90 - Other 28 30 90 00 - Other Commodity Code Description 28 30 90 00 000 - Other