Experimental octanol/water partition coefficients of chlorinated paraffins

Octanol/water partition coefficients (KOW) of chlorinated paraffins (CPs) from a commercial mixture (‘Cereclor 60L’) were determined using a “slow-stirring” method. Log KOW values for the different congener groups ranged from 5.85 to 7.14. Equilibrium was reached within a few days, and KOW values were the same at two CP-concentrations. A clear relationship is found between the total number of chlorine and carbon atoms and log KOW for the CP-congener groups and a series of smaller chlorinated alkanes from the literature.