Disclosed is a water-soluble and oil-soluble oil solution, which enables to have excellent feeling of use without making the skin greasy when applied thereto. Also disclosed are a lubricant, a moisture-retaining agent and a preparation for external application, each containing such an oil solution. Specifically disclosed is an oil solution containing a dibasic acid ester compound represented by the following general formula (I). In the formula (I), R1 represents an optionally substituted alkylene group having 2-4 carbon atoms; R2 and R3 independently represent an optionally substituted alkyl group having 1-4 carbon atoms; and n and m independently represent an integer of 0-4, with m + n being not less than 1 (excluding the case when both R2 and R3 are ethyl groups and both n and m are 1).
本发明公开了一种
水溶性和油溶性油溶液,涂抹在皮肤上不会使皮肤变得油腻,而是具有极佳的使用感。此外,还公开了一种润滑剂、一种保湿剂和一种外用制剂,每一种都含有这种油溶液。具体公开了一种油溶液,其中含有由以下通式 (I) 表示的二盐基酸酯化合物。在式 (I) 中,R1 代表具有 2-4 个碳原子的任选取代的亚烷基;R2 和 R3 独立地代表具有 1-4 个碳原子的任选取代的烷基;n 和 m 独立地代表 0-4 的整数,其中 m + n 不小于 1(不包括 R2 和 R3 均为乙基且 n 和 m 均为 1 的情况)。