label: chloridazon-catechol dioxygenase activity
label_lc: chloridazon-catechol dioxygenase activity
description: "Catalysis of the reaction: 5-amino-4-chloro-2-(2,3-dihydroxyphenyl)pyridazin-3(2H)-one + O2 = 5-amino-4-chloro-2-(2-hydroxymuconoyl)pyridazin-3(2H)-one + 2 H+."