[OH-:1].[Cu+2:2].[OH-].[CH:4]([OH:6])=[O:5]>>[OH2:5].[OH2:1].[OH2:5].[OH2:5].[CH:4]([O-:6])=[O:5].[Cu+2:2].[CH:4]([O-:6])=[O:5]To 1.62 kg of copper hydroxide powder was added 4.8 kg of a 80% aqueous solution of formic acid, and this mixture was stirred for 1 hour. Upon filtration of the resulting mixture, copper formate tetrahydrate was obtained, which was then dehydrated at 100° C. under vacuum to obtain anhydrous copper formate.
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