CAS 65212-77-3 appears in our catalog under these names: Benzenesulfonic acid, 4,5-dichloro-2-[2-[4,5-dihydro-3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-yl]diazenyl]-, calcium salt (1:1), Pigment Yellow 183. Offered by: Chemat, MedChemExpress. Available pack sizes: 1g, 5g, 25g, Get quote.