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根据美国《食品质量保护法》的规定，有机磷农药被美国环保局列为最先接受再登记和残留限量再评价的一类农药。这些化合物既是最危险也是最被广泛使用的一类农药。由于毒性机制相同，各种有机磷农药的危害具有累加性，美国环保局必须评价所有有机磷农药的总接触量和总风险程度
According to the United States “Food Quality Protection Law” requirement, organophosphorus pesticides by the United States Environmental Protection Agency as the first to receive re-registration and residue limits re-evaluation of a class of pesticides. These compounds are both the most dangerous and the most widely used class of pesticides. Due to the same toxicological mechanisms, the hazards of various organophosphorus pesticides are cumulative, and the EPA must evaluate the total exposure and the overall risk level for all organophosphorus pesticides