Categories

CN2819

28 Inorganic Chemicals, Organic or Inorganic Compounds of Precious Metals, of Rare-earth Metals, of Radioactive Elements or of Isotopes

2819 (01/1988-..) Chromium Oxides and Hydroxides

28191000 (01/1988-..) Chromium Trioxide

28199000 (01/1988-12/1996) Chromium Oxides and Hydroxides (Excl. Chromium Trioxide)

28199010 (01/1997-..) Chromium Dioxide

28199090 (01/1997-..) Chromium Oxides and Hydroxides (Excl. Chromium Trioxide and Chromium Dioxide)