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64109-29-1 2,7-naphthalenedisulfonic acid, 4,5-dihydroxy-3-(2-naphthalenylazo)-,disodium salt

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Product Name 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-(2-naphthalenylazo)-,disodium salt
CAS No. 64109-29-1
Molecular Formula C20H14N2O8S2・2Na