Abstract
The solubilities of C60 and C70 at 25°C in seven normal alcohols obey the relationship InY = a + bX + cX2, where Y is solubility and X is the Hildebrand solubility parameter of the solvent. Extrapolation to the solubility parameter of water yields solubilities in water of 1.3′10−11 (C60) and 1.3′10−10(C70) ng/ml with an uncertainty of one order of magnitude.