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 13 Sulphides of non-metals; commercial phosphorus trisulphide. 28 13 90 Other 28 13 90 00 Other Commodity Code Description 28 13 90 00 000 Other