Q. Has paraquat been found to cause cancer, birth defects or to be neurotoxic?

A. No. The current EPA registration documentation for paraquat (EPA ‘RED’, August 1997) clearly indicates that the EPA does not consider neurotoxicity to be an issue with the compound. The EPA also stated that a developmental neurotoxicity study was not required. According to the World Health Organization (Environmental Health Criteria 39, 1984) paraquat has not been found to be teratogenic (to cause birth defects) or carcinogenic (to cause cancer) in long-term studies on rats and mice.