A study of the inhalation of pentachlorophenol by rats. Part II. A new inhalation exposure system for high doses in short exposure time.

An exposure system has been designed which is applicable for short time, acute exposures of rats to the aerosol of pesticides. The aerosol is generated by compressed air aspiration. Larger droplets are removed by a cyclone separation. The exposure chamber has 12 inhalation sites separated from the animal containers by rubber seals which insure inhalation as the only route of exposure.