據(jù)美國聯(lián)邦公報消息，5月19日加拿大環(huán)保署發(fā)布通告，豁免順丁烯二酸酐（maleic anhydride ）的最大殘留限量。

　　本次限量修訂申請由Exponent代表Cheminova A/S公司提出。美國環(huán)保署認為，當順丁烯二酸酐按照不超過3.5%（重量計）比例作為農藥成分用于作物時，豁免最大殘留限量要求。

　　部分原文報道如下：

　　This regulation establishes an exemption from the requirement of a tolerance for residues of maleic anhydride （CAS Reg. No. 108-31-6） when used as an inert ingredient （stabilizer） in pesticide formulations applied to growing crops at a maximum concentration not to exceed 3.5% by weight in the pesticide formulation. Exponent, on behalf of Cheminova A/S, submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act （FFDCA）， requesting an amendment to an existing requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of maleic anhydride.

　　原文鏈接：

　　<https://www.federalregister.gov/articles/2016/05/19/2016-11837/maleic-anhydride-exemption-from-the-requirement-of-a-tolerance>