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 36 Carbonates; peroxocarbonates; commercial ammonium carbonate 28 36 99 Lead carbonates 28 36 99 20 Lead carbonates Commodity Code Description 28 36 99 20 00 Lead carbonates