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|Section2= |Section3= |Section4= |Section6= |Section7= |Section8= }} Dichlorodiphenyldichloroethane (DDD) is an organochlorine insecticide that is slightly irritating to the skin.〔Merck Index, 11th ed, p482〕 DDD is a metabolite of DDT.〔“p,p'-Dichlorodiphenyl dichloroethane (DDD) (CASRN 72-54-8).” ''Integrated Risk Information System''. 25 Jan. 2007. United States Environmental Protection Agency. 23 Apr. 2007 DDD is in the “Group B2” classification, meaning that it is a probable human carcinogen. This is based on an increased incidence of lung tumors in male and female mice, liver tumors in male mice, and thyroid tumors in male rats. Further basis is that DDD is so similar to and is a metabolite of DDT, another probable human carcinogen.〔 DDD is no longer registered for agricultural use in the United States, but the general population continues to be exposed to it due to its long persistence time. The primary source of exposure is oral ingestion of food.〔“DDD.” ''Hazardous Substances Data Bank''. United States National Library of Medicine. 25 Apr. 2007 1946 is the date of the earliest recorded use in English of the abbreviation “DDD” to stand for dichlorodiphenyldichloroethane, as far as could be determined.〔 ==Mitotane== Interestingly enough, if one of the ''p''-chlorines in DDD is switched to ''ortho''-position, then we get a useful chemotherapeutic agent, mitotane. This is an example of a positional isomer. 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「Dichlorodiphenyldichloroethane」の詳細全文を読む スポンサード リンク
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