2825: Hydrazine, hydroxylamine, metal oxides, hydroxides ne

282510: Hydrazine and hydroxylamine, 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: Metal bases, oxides, hydroxides, peroxides, nes 2825: Hydrazine, hydroxylamine, metal oxides, hydroxides ne