Synonyms: 7-Benzothiazolesulfonic acid, 2-(4-(2-(4,5-dihydro-1-(hydroxymethyl)-3-methyl-5-oxo-1H-pyrazol-4-yl)diazenyl)phenyl)-6-methyl-, compd. with 2,2',2''-nitrilotris(ethanol) (1:1);7-Benzothiazolesulfonic acid, 2-(p-((1-(hydroxymethyl)-3-methyl-5-oxo-2-pyrazolin-4-yl)azo)phenyl)-6-methyl-, compd. with 2,2',2''-nitrilotriethanol (1:1);2-(4-((1-(Hydroxymethyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)phenyl)-6-methylbenzothiazole-7-sulphonic acid, compound with 2,2',2''-nitrilotris(ethanol) (1:1);7-Benzothiazolesulfonic acid, 2-(4-((1-(hydroxymethyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)phenyl)-6-methyl-, compd. with 2,2',2''-nitrilotris(ethanol) (1:1);2-(4-{(E)-[(4R)-1-(hydroxymethyl)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}phenyl)-6-methyl-1,3-benzothiazole-7-sulfonic acid