4-Chloro-2-(3,4-dichlorophenyl)-5-((6-iodo-3-pyridinyl)methoxy)-3(2H)-pyridazinone , its CAS NO. is 122322-18-3, the synonyms are 3(2H)-Pyridazinone, 4-chloro-2-(3,4-dichlorophenyl)-5-((6-iodo-3-pyridinyl)methoxy)- .