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 30 Sodium dichromate 28 41 30 00 Sodium dichromate Commodity Code Description 28 41 30 00 000 Sodium dichromate