91672-67-2 Chromium, 2-carboxybenzenediazonium-2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulfonic acid-4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulfonic acid coupling products sodium complexes EINECS 294-076-4