According to estimates of the parameters of the critical crossover in monolayers of long-chain alcohol molecules adsorbed at the n-hexane - water interface, all systems in which this phenomenon is observed are characterized by the same value of the critical exponent ν \approx 1.8.
Cite
@article{arxiv.1006.0627,
title = {The Critical Crossover at the n-Hexane - Water Interface},
author = {Aleksey M. Tikhonov},
journal= {arXiv preprint arXiv:1006.0627},
year = {2015}
}