Abstract: An electrolytic solution for operating electrolytic capacitors which deteriorates extremely little in electrical properties even when used in a high-tension capacitor. The electrolytic solution comprises a compound expressed by general formula (1) below and a compound expressed by general formula (2) below or their salts: where each R is a same or different alkyl group, and R? is hydrogen, a methyl group or an ethyl group, and n is an integer of 0 to 14.

Abstract: An electrolytic solution for operating electrolytic capacitors which deteriorates extremely little in electrical properties even when used in a high-tension capacitor. The electrolytic solution comprises a compound expressed by general formula (1) below and a compound expressed by general formula (2) below or their salts: where each R is a same or different alkyl group, and R? is hydrogen, a methyl group or an ethyl group, and n is an integer of 0 to 14.

Abstract: A mixture of long-chain dibasic acids comprising one or more long-chain dibasic acid having an alkyl group at its side chain and one or more long chain dibasic acid having a carbon chain of 8 or more carbon atoms between both its carboxyl groups and having an alkyl group and one or more alkoxycarbonyl group at its side chain is provided. This mixture can be used as the electrolyte of an electrolytic solution for electrolytic capacitors. This electrolytic solution can be produced very simply, hardly raises any precipitation at low temperatures and is tolerant to high voltage.

Abstract: A novel fluorine-containing compound of the formulaR.sub.1 --A--R.sub.2whereinA is ##STR1## R.sub.1 and R.sub.2 are each hydrogen or R.sub.3 OOC--CH.sub.2).sub.n, while R.sub.1 and R.sub.2 may not be hydrogen at the same time; X is hydrogen or halogen; R.sub.3 is hydrogen or a lower alkyl group; m is an integer of 1 to 5; and n is an integer of 4 to 11, and a process for preparing the same.