72152-59-1 Benzoic acid, 2,4-dihydroxy-5-((2-hydroxy-3-nitro-5-sulfophenyl)azo)-, disodium salt Disodium 2,4-dihydroxy-5-((2-hydroxy-3-nitro-5-sulphonatophenyl)azo)benzoate EINECS 276-412-1