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, Mercury and Lead) 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`