1953 年 73 巻 7 号 p. 732-736
Solubility of 2-methyl-1, 4-naphthoquinone in the aqueous solution of nonionic surface-active agents possessing a polyoxyethylene group was determined and following characteristics were observed. The solubility of 2-methyl-1, 4-naphthoquinone was approximately proportional to the concentration of the surface-active agent but the solubilizing efficiency was better at a lower concentrations. At a very high concentration region of the active agent, the solubilizing efficiency was found to increase rapidly. Compared in the same weight/volume concentration, active agents with less oxyethylene group possessed better solubilizing efficiency. These results were compared with the solubility in an aqueous solution of a few ionic surface-active agents and simple observations were made.