Categories

CN2820

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

2820 (01/1988-..) Manganese Oxides

28201000 (01/1988-..) Manganese Dioxide

28209000 (01/1988-12/1996) Manganese Oxides (Excl. Manganese Dioxide)

28209010 (01/1997-..) Manganese Oxide Containing by Weight >= 77% of Manganese

28209090 (01/1997-..) Manganese Oxides (Excl. Manganese Dioxide and Manganese Oxide Containing by Weight >= 77% of Manganese)