2833 Sulphates, alums, peroxosulphates `persulphates`

2833 (01/1988-..) Sulphates, alums, peroxosulphates `persulphates` 28331100 (01/1988-..) Disodium sulphate 28331900 (01/1988-..) Sodium sulphates (excl. disodium) 28332100 (01/1988-..) Sulphate of magnesium 28332200 (01/1988-..) Sulphate of aluminium 28332300 (01/1988-12/2006) Sulphates of chromium 28332400 (01/1988-..) Sulphates of nickel 28332500 (01/1988-..) Sulphates of copper 28332600 (01/1988-12/2006) Sulphate of zinc 28332700 (01/1988-..) Sulphate of barium 28332910 (01/1988-12/2006) Sulphate of cadmium 28332920 (01/2007-..) Sulphates of cadmium, of chromium and of zinc 28332930 (01/1988-..) Sulphates of cobalt and of titanium 28332950 (01/1988-12/2008) Sulphates of iron 28332960 (01/2007-..) Sulphates of lead 28332970 (01/1988-12/2006) Sulphates of mercury and of lead 28332980 (01/2009-..) Sulphates (excl. of sodium, magnesium, aluminium, nickel, copper, barium, cadmium, chromium, zinc, cobalt, titanium, lead and mercury) 28332990 (01/1988-12/2008) Sulphates (excl. of sodium, magnesium, aluminium, chromium, nickel, copper, zinc, barium, cadmium, cobalt, titanium, iron, lead and mercury) 28333000 (01/1999-..) Alums 28333010 (01/1988-12/1998) Aluminium ammonium bis`sulphate` 28333090 (01/1988-12/1998) Alums (excl. aluminium ammonium bis`sulphate`) 28334000 (01/1988-..) Peroxosulphates `persulphates`