It was found that the molecular weights of adducts in the acid-catalyzed reactions of epichlorohydrin with alcohols obey the Weibull-Nycander distribution but not the Flory distribution. The distribution constants (C=ki⁄k0) were found to be smaller than 1, indicating that the reaction rate of the initial stage (k0), i.e., the reaction of epichlorohydrin with a starting alcohol, is greater than the