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 22 Cobalt oxides and hydroxides; commercial cobalt oxides 28 22 00 Cobalt oxidesa nd hydroxides; commericial cobalt oxides 28 22 00 00 Cobalt oxidesa nd hydroxides; commericial cobalt oxides Commodity Code Description 28 22 00 00 000 Cobalt oxidesa nd hydroxides; commericial cobalt oxides