... .I. 18792);C.I. Pigment Yellow 183, calcium salt;Calcium 4,5-dichloro-2-[[4,5-dihydro-3-methyl-5-oxo-1-(3 ... -sulphonatophenyl)-1H-pyrazol-4-yl]azo]benzenesulphonate;Benzenesulfonic acid, 4,5-dichloro-2-4,5-dihydro-3-methyl-5-oxo ... -1-(3-sulfophenyl)-1H-pyrazol-4-ylazo-, calcium salt (1:1)CBNumber : CB4914383Molecular Formula : C16H10CaCl2N4O7S2Formula Weight : 545.3872 ...