The solubility of sec-butylbenzene (1) water (2) has been reported in three works listed below.

The data of Andrews and Keefer seem to be high. The mean value of the remaining data is tentative.

The solubility of water (2) in sec-butylbenzene (1) has been reported in one work listed below:

Since these data are from one source only, they are regarded as tentative.

References:

1 Andrews, L. J.; Keefer, R. M.; J. Am. Chem. Soc. 1950, 72, 5034-7.
2 Englin, B. A.; Plate, A. F.; Tugolukov, V. M. Pryanishnikova, M. A.; Chem. Technol. Fuels Oils, 1965, 1(9), 722-726.
3 Sutton, C.; Calder, J. A.; J. Chem. Eng. Data 1975, 20, 320-2.
4 Krzyzanowska, T.; Szeliga, J.; Nafta (Katowice) 1978, 12, 413-7.