3H-Pyrazol-3-one, 4-((4-chloro-2,5-dimethoxyphenyl)azo)-2,4-dihydro-5-methyl-2-phenyl- 4-((4-Chloro-2,5-dimethoxyphenyl)azo)-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one 4-((4-Chloro-2,5-dimethoxyphenyl)azo)-3-methyl-1-phenyl-5-oxo-1H-pyrazole 61550-76-3 EINECS 262-839-0