Twelve male rats were fed a diet containing 3.3 ppm Kepone-14C for 3 days. After 1 day on the control diet, six animals received a ration containing 8% light liquid paraffin for 24 days. The remaining six animals served as control. Paraffin-treated rats excreted significantly more radioactivity with feces (61%) compared to controls (52%) and had significantly lower concentrations of radioactivity in 14 of 18 tissues analyzed. Excretion of radioactivity with urine was of minor importance (0.5-0.6%) in both groups.