[C:1]([O-:6])(=[O:5])[CH:2]([CH3:4])[OH:3].[Zn+2:7].C([O-])(=O)C(C)O.[C:14]([CH:17]([CH:19]([C:21]([O-:23])=[O:22])[OH:20])[OH:18])([O-:16])=[O:15].[Zn+2].[OH-].[NH4+:26]>O.C(O)(=O)C(C)O>[C:1]([O-:6])(=[O:5])[CH:2]([CH3:4])[OH:3].[Zn:7].[NH4+:26].[C:14]([CH:17]([CH:19]([C:21]([O-:23])=[O:22])[OH:20])[OH:18])([O-:16])=[O:15].[Zn+:7].[NH4+:26]
In a suitable reaction vessel, 1 gram of zinc lactate and 1 gram of zinc tartrate were suspended in 10 ml of water, and the suspension was stirred mechanically. Sufficient ammonium hydroxide was added to the mixture until a clear solution resulted which was then diluted with lactic acid (85%) to produce a solution of ammonium zinc lactate and ammonium zinc tartrate complexes. The solution had a pH of 7 and was odorless. When evaporated under gentle heat in a suitable vessel a solid zinc complex was obtained. The powdered material also was odorless and very soluble in water.
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