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Report a problem with Tetrasodium 5-[[2,4-dihydroxy-5-[[4-[(4-nitro-2-sulphonatophenyl)amino]phenyl]azo]phenyl]azo]-4-hydroxy-3-[[4-[(4-nitro-2-sulphonatophenyl)amino]phenyl]azo]naphthalene-2,7-disulphonate (EC: 274-430-4) (CAS 70210-34-3).