本文件旨在对饮用水中的不受管制污染物2,4-戊二酮进行毒理学评估，作为NSF/ANSI 61（2014）评估的一个或多个饮用水系统组件的萃取剂，或作为NSF/ANSI 60（2014）评估的饮用水处理化学品中的污染物。非癌症终点和癌症终点都得到了考虑，并且使用了美国环境保护局（U.S.EPA）开发的风险评估方法。

This document has been prepared to allow toxicological evaluation of the unregulated contaminant 2,4-pentanedione in drinking water, as an extractant from one or more drinking water system components evaluated under NSF/ANSI 61 (2014), or as a contaminant in a drinking water treatment chemical evaluated under NSF/ANSI 60 (2014). Both non-cancer and cancer endpoints have been considered, and risk assessment methodology developed by the U.S. Environmental Protection Agency (U.S. EPA) has been used.