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(57) Abstract: An aluminum electrolytic capacitor having high conductivity and high spark voltage, which is stable in a high temperature range, and an electrolytic solution for such an electrolytic capacitor are obtained. SOLUTION: 1,2,3,4-tetramethylimidazoline salt of carboxylic acid represented by the following structural formula [1] is used as a solute. Embedded image (In the formula, X represents a carboxylic acid.) |