1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, 4-benzoyl-3-hydroxy-1,2-phenylene ester 2-Diazo-1,2-dihydro-1-oxo-5-naphthalenesulfonic acid, 3,4-diester and 2,3,4-trihydroxybenzophenone 32060-64-3 4-Benzoyl-3-hydroxy-1,2-phenylene bis(6-diazo-5,6-dihydro-5-oxonaphthalene-1-sulphonate) 86416-25-3 EINECS 250-907-2