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6406-51-5 2,7-naphthalenedisulfonic acid,4-hydroxy-3-[[4-(phenylazo)phenyl]azo]-, disodium salt

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Product Name 2,7-Naphthalenedisulfonic acid,4-hydroxy-3-[[4-(phenylazo)phenyl]azo]-, disodium salt
CAS No. 6406-51-5
Molecular Formula C22H16N4O7S2・2Na