The solubility of C-60 in 60 different organic and 7 inorganic liquids at room temperature is given. Although certain tendencies between single solvent parameters and the solubilities are evident, a generally valid correlation can be imagined in a multiparameter space. All the meaningful evidence indicate that C-60 is monomeric in all solvents. The aggregate formation concluded from light-scattering experiments are probably an artifact due to the non-linear optical behavior of the solutions. The great differences in some of the experimentally determined solubilities of C-60 in the same solvent may be caused by phase transformation due to mechano- or sonochemical effects.