Synonyms: Benzenesulfonic acid, 4-chloro-3-(4,5-dihydro-3-methyl-5-oxo-4-(2-phenyldiazenyl)-1H-pyrazol-1-yl)-, compd. with N-octyl-1-octanamine (1:1);Benzenesulfonic acid, 4-chloro-3-(4,5-dihydro-3-methyl-5-oxo-4-(phenylazo)-1H-pyrazol-1-yl)-, dioctylamine salt;4-Chloro-3-(4,5-dihydro-3-methyl-5-oxo-4-(phenylazo)-1H-pyrazol-1-yl)benzenesulphonic acid, compound with dioctylamine (1:1);Benzenesulfonic acid, 4-chloro-3-(4,5-dihydro-3-methyl-5-oxo-4-(phenylazo)-1H-pyrazol-1-yl)-, compd. with N-octyl-1-octanamine (1:1);4-chloro-3-{3-methyl-5-oxo-4-[(E)-phenyldiazenyl]-4,5-dihydro-1H-pyrazol-1-yl}benzenesulfonic acid - N-octyloctan-1-amine (1:1)