3,4-chloro-1,2-dihydro, 4-chloro-1,2-dihydro-pyridazine-3,6-dione, 4-Chlor-1,2-dihydro-pyridazin-3,6-dion, Chlormaleinsaeurehydrazid, EINECS 226-422-7, 3,6-DIHYDROXY-4-CHLOROPYRIDAZINE, 4-Chlor-3.6-dioxo-1.2.3.6-tetrahydro-pyridazin, 4-Chlor-3,6-dihydroxy-pyridazin