HS CodesVI · Products of the chemical or allied industries28 · Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes2833283330283330Chapter 28Copy pageAlumsDescriptionSulphates; alums; peroxosulphates (persulphates) : AlumsWas this page helpful?YesNoPrevious283329OtherNextPeroxosulphates (persulphates)283340