Potassium;sodium;(3z)-5-[[3-(2-chloroethylsulfonyl)benzoyl]amino]-4-oxo-8-sulfo-3-[(2-sulfonatophenyl)hydrazinylidene]naphthalene-2-sulfonate
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4-((3-((2-Chloroethyl)sulphonyl)benzoyl)amino)-5-hydroxy-6-((2-sulphophenyl)azo)naphthalene-1,7-disulphonic acid, potassium sodium salt