2,5-Dichloro-4-(4,5-dihydro-3-methyl-5-oxo-4-((4-sulphophenyl)azo)-1H-pyrazol-1-yl)benzenesulphonic acid, compound with N,N'-di-o-tolylguanidine (1:2) 84753-00-4 EINECS 283-846-5