Explanatory notes
… oxides, containing 70 % or more by weight of combined iron calculated as Fe 2 O 3 , fall in this heading. For the … oxide). Used as a pigment (iron minium, jewellers’ rouge or colcothar), either in the pure state (in which case it is classified in this heading), or mixed with clay, calcium sulphate (Venetian red), etc. (it then falls in …