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|Section2= |Section3= }} Paraquat is the trade name for ''N'',''N''′-dimethyl-4,4′-bipyridinium dichloride, is the organic compound with the formula ()Cl2. It is classified as a viologen, a family of redox-active heterocycles of similar structure. This salt is one of the most widely used herbicides. It is quick-acting and non-selective, killing green plant tissue on contact. It is also toxic to human beings and animals. It is linked to development of Parkinson's disease. The name is derived from the ''para'' positions of the ''quat'' ernary nitrogens. A variety of related compounds are used in textiles. ==Production== Pyridine is coupled by treatment with sodium in ammonia followed by oxidation. The resulting 4,4'-bipyridine, which is then methylated with chloromethane to give the desired compound:〔(【引用サイトリンク】 publisher = IPCS INCHEM )〕 :400px 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Paraquat」の詳細全文を読む スポンサード リンク
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