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2-Naphthalenesulfonic acid,7-amino-4-hydroxy-3-[[6(or 7)-sulfo-4-[[6(or 7)-sulfo-4-[(3-sulfophenyl)azo]-1- naphthalenyl]azo]-1-naphthalenyl]azo]-,tetrasodium salt
2-Naphthalenesulfonic acid,7-amino-4-hydroxy-3-[[6(or 7)-sulfo-4-[[6(or 7)-sulfo-4-[(3-sulfophenyl)azo]-1- naphthalenyl]azo]-1-naphthalenyl]azo]-,tetrasodium salt CAS NO.33540-94-2