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en·do·sul·fan | \ ˌen-də-ˈsəl-fən 
, -ˌfan \
, -ˌfan \Definition of endosulfan
: a toxic crystalline chlorinated insecticide and acaricide C9H6Cl6O3S used especially on food crops
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Time Traveler for endosulfan
The first known use of endosulfan was in 1961
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