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117205-02-4O.O.O=C([O-])C(=O)[O-].[Ni+2]VNYOIRCILMCTHO-UHFFFAOYSA-L117205-02-4、6018-94-6DTXSID401319216light green powder(s) . Nickel(II) Oxalate Dihydrate [6018-94-6], Ni(COO)2·2 H2O, Mr 182.76, precipitates as a green powder when oxalic acid or alkali-metal oxalate solutions are added to nickel(II) salt solutions. When heated in vacuum, it evolves water at 150 ℃ and decomposes completely at 300 ℃, giving finely divided nickel suitable for use in catalysis or in the production of nickel carbonyl.
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용도Nickel oxalate is used for the production of nickel catalysts and magnetic materials.
생산 방법Nickel Oxalate is produced as a greenish white crystalline dihydrate.
Nickel(II) oxalate precipitates as NiC2O42H2O when oxalic acid is added to nickel salt solutions. It is isomorphous with the oxalates of magnesium, zinc and iron(II), and has μeff=2.95 BM. When heated in vacuo it decomposes evolving water above 150° and carbon dioxide above 300° leaving finely divided nickel suitable for catalytic purposes or reacting to form the carbonyl. The oxalate dissolves in acids with decomposition and in ammonia with ammine formation.
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