2825: Hydrazin, hydroxylamin...; o inorgn base; o met oxid, hydroxid & pero

282510: Hydrazine and hydroxylamine and their inorganic salts 282520: Lithium oxide and hydroxide 282530: Vanadium oxides and hydroxides 282540: Nickel oxides and hydroxides 282550: Copper oxides and hydroxides 282560: Germanium oxides and zirconium dioxide 282570: Molybdenum oxides and hydroxides 282580: Antimony oxides 282590: Inorganic bases nes; metal oxides, hydroxides and peroxides nes 2825: Hydrazin, hydroxylamin...; o inorgn base; o met oxid, hydroxid & pero