Effects of a 13-Week Chloropentafluorobenzene Inhalation Exposure of Fischer 344 Rats and B6C3F1 Mice

Chloropentafluorobenzene (CPFB) has been identified as a can didate simulant for nonpersistent chemical warfare agents. Acute toxicity studies have shown that CPFB has limited adverse ef fects on laboratory animals. A 21-day inhalation study of rats and mice to 2.5, 0.8, and 0.25 mg CPFB/liter resulted in re duced weight gain in male and female rats exposed at the high concentration only and identified the liver as a potential target organ. This multiconcentration inhalation study was designed to detect a no-observable-effect level associated with repeated expo sure to CPFB. Male and female rats and mice were exposed to 250, 50, or 10 mg CPFB/m3 (0.25, 0.05, or 0.01 mg CPFB/li ter) for 13 weeks. No treatment-related effects on body weight, clinical chemistries, mortality, absolute or relative organ weight or histopathology were noted.