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 41 Salts of oxometallic or peroxometallic acids. 28 41 50 Other chromates and dichromates, peroxochromates Commodity Code Description 28 41 50 00 Other chromates and dichromates, peroxochromates