72828-65-0 Benzenesulfonic acid, 3,3'-(cyclohexylidenebis(4,1-phenyleneazo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)))bis(4-chloro-, disodium salt Disodium 3,3'-(cyclohexylidenebis(4,1-phenyleneazo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)))bis(4-chlorobenzenesulphonate) EINECS 276-880-7