ID 1.13.11.36 DE Chloridazon-catechol dioxygenase. CA 5-amino-4-chloro-2-(2,3-dihydroxyphenyl)-3(2H)-pyridazinone + O(2) = CA 5-amino-4-chloro-2-(2-hydroxymuconoyl)-3(2H)-pyridazinone. CF Iron. CC -!- Involved in the breakdown of the herbicide chloridazon. CC -!- Not identical with EC 1.13.11.1, EC 1.13.11.2 or EC 1.13.11.5. //