ABSTRACT
EPN is expected to be released to the environment primarily during aerial and ground spraying of various agricultural crops. If released to soil or water, breakdown of EPN is expected to proceed primarily through hydrolysis and oxidation to phenylphosphonic acid. Particulate phase EPN may be removed from the atmosphere by wet or dry deposition. In addition, EPN has the potential to undergo direct photolysis. EPN is expected to be released to the environment primarily during aerial and ground spraying of various agricultural crops including cotton, rice, and apples. EPN vapor is expected to react rapidly with photochemically generated hydroxyl radicals. The persistence of EPN was influenced by soil type and moisture. The most probable routes of exposure to EPN are inhalation and dermal contact which may occur at sites where it is produced and used as a pesticide. Workers involved in the manufacture or use of the pesticide EPN are exposed to this compound primarily by inhalation and dermal contact.
