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 isotopes28322832Chapter 28Copy pageSulphites; thiosulphatesDescriptionSulphites; thiosulphatesSubheadings283210Sodium sulphites283220Other sulphites283230ThiosulphatesWas this page helpful?YesNoPrevious2831Dithionites and sulphoxylatesNextSulphates; alums; peroxosulphates (persulphates)2833