2,5-dichloro-4-[4-[[4-[(cyclohexylamino)carbonyl]phenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid, compound with N,N'-di(o-tolyl)guanidine (1:1)
CAS No. 94249-06-6