The solubilities of benzoic acid, salicylic acid, resorcinol and hydroquinone in water and in 1-octanol were measured by the dynamic method which is also called the synthetic method from 297.25 K to 334.45 K. Using differential scanning calorimetry (DSC Q2000 and SDT Q600), the melting temperature and the enthalpy of fusion of these solutes were determined. The obtained results show that the solubility of benzoic acid in water is greater than that of salicylic acid, but in the case of the two isomers of dihydroxybenzene, the solubility of resorcinol is approximately 100 times that of hydroquinone. In 1-octanol, the decreasing order of the solubility of these compounds is as follows: resorcinol > benzoic acid > salicylic acid > hydroquinone. The experimental solubilities were correlated using two regression equations. The correlation coefficient is greater than 0.9937 for one of these two equations for the binary studied systems where the solvent is either water or 1-octanol. New experimental data are provided for the solubility of resorcinol in water and salicylic acid, resorcinol, hydroquinone in 1-octanol.

中文翻译：

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在 297.25 K 至 334.45 K 的温度下苯甲酸、水杨酸、间苯二酚和对苯二酚在水中和 1-辛醇中溶解度的测定和相关性

苯甲酸、水杨酸、间苯二酚和对苯二酚在水中和1-辛醇中的溶解度采用动态法（也称为合成法）在297.25 K至334.45 K范围内测量。 使用差示扫描量热法（DSC Q2000和SDT Q600） ，确定了这些溶质的熔化温度和熔化焓。所得结果表明，苯甲酸在水中的溶解度大于水杨酸，但在二羟基苯两种异构体的情况下，间苯二酚的溶解度约为对苯二酚的100倍。在1-辛醇中，这些化合物的溶解度递减顺序为：间苯二酚>苯甲酸>水杨酸>对苯二酚。使用两个回归方程关联实验溶解度。对于溶剂是水或 1-辛醇的二元研究系统，这两个方程之一的相关系数大于 0.9937。为间苯二酚在水中的溶解度和水杨酸、间苯二酚、氢醌在 1-辛醇中的溶解度提供了新的实验数据。