Naphthalene with Ethylbenzene (IUPAC SDS Volume 59)
Evaluator
William E. Acree, Jr. Department of Chemistry University of North Texas
Evaluation
Naphthalene solubilities in ethylbenzene were retrieved from papers by Kravchenko (1), Acree et al. (2), Heric and Posey (3), and Chang (4). The first study reports values at several temperatures, Acree et al. determined values at 303, 308 and 313 K, and both Heric and Posey and Chang measured only the mole fraction solubility at 298 K. There is not a prior reason to exclude any of the four studies from the critical evaluation.
Regressional analysis of the experimental data as Ln x1 versus 1/T yielded the following mathematical relationship: Ln x1 = - 2162.0 (1/T) + 6.0544 (r=0.9979) for variation of naphthalene solubility with absolute temperature (see graph below).
Figure
Solubility graph
Sources:

1 Kravchenko, V. M.; Zh. Prikl. Khim. 1949, 22, 724-733.
2 Acree Jr., W. E.; Pontikos, N. M.; Judy, C. L.; Int. J. Pharm. 1986, 31, 225-230.
3 Heric, E. L.; Posey, C. D.; J. Chem. Eng. Data 1964, 9, 35-43.
4 Chang, W.; Ph.D Dissertation, North Dakota State University, ND, 1969.