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 42 Other salts of inorganic acids or peroxoacids, excluding azides 28 42 90 Copper or chromium salts 28 42 90 20 Copper or chromium salts Commodity Code Description 28 42 90 20 00 Copper or chromium salts
