The solubility of 1-methylnaphthalene in water at 25°C was reported to be 25.8 mg(1)/kg (2) and 1.81 × 104 mol(l) L (2).The corresponding mass percent and mole fraction, x1, calculated by the compiler are 2.58 × 103 g(1)/100 g sln and 3.27 × 106.