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. Commodity Code Description 28 41 30 Sodium dichromate 28 41 50 Other chromates and dichromates, peroxochromates 28 41 61 Potassium permanganate 28 41 69 Other 28 41 70 Molybdates 28 41 80 Tungstates (wolframates) 28 41 90 Other