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 of isotopes 28 52 Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgams Commodity Code Description 28 52 10 Chemically defined inorganic or organic compounds of mercury, whether or not chemically 28 52 90 Other