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Identification of Safener in Three Commercial Herbicide for Clodinafop-Propargyl by GC/MS.

The purpose of this study is to figure out the chemical properties of three-different herbicide formulations (Arena7% OD, Koback24% EC, and Topik 15% WP) before and after storage at elevated temperatures of 54C±2, and stability of formulations under study after exposure to UV rays. GC/MS was used to identify if tested formulations including safener in it is composition, and it was also used to prove mass fragmentation of tested formulations. GC/MS, analysis, demonstrates that only Topik contains safener material (Cloquintocetmexyl), while, it was not found in both, Arena and Koback. Furthermore, four primary photolysis products were identified by GC/MS as 2-[(5-chloro-3-fluoro-2-pyridyloxy) phenoxy]propanoic acid and prop-2-ynyl-2-[(5chloro-3-hydroxy-2-pyridyloxy) phenoxy] propanoate, Ethyl2-[(5-chloro-3-fluoro-2pyridyloxy) phenoxy] propanoate and 1-hydroxypropanyl-2-[(5-chloro-3-fluoro-2-pyridyloxy) phenoxy] propanoate were minor components. Due to paramount importance of presence of safener in herbicides, we recommend pesticide companies pay attention to adding safeners to herbicides to protect agricultural crops and reduce losses resulting from them. Also, we advise storing pesticides in typical stores (controlled by temperature and humidity) to prevent degradation of pesticides. In many cases, it produces compounds that may be more toxic than original pesticide. The aim of this paper we advise pesticides companies to add safener, and also advise farmers to use herbicides that contain the safener to protect important agricultural crops to prevent losses.