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IUPAC Name: sodium;(3Z)-3-[[4-[4-[(2Z)-2-[(5E)-4,6-dioxo-5-[(4-sulfonaphthalen-1-yl)hydrazinylidene]cyclohex-2-en-1-ylidene]hydrazinyl]phenyl]phenyl]hydrazinylidene]-6-oxocyclohexa-1,4-diene-1-carboxylic acid | CAS Registry Number: 6442-05-3
Synonyms: Congo Brown R, Pontamine Brown CR, Tertrodirect Brown CR, C.I. Direct Brown 21, NSC47759, NSC-47759, C.I. Direct Brown 21, disodium salt, Benzoic acid,4-dihydroxy-3-[(4-sulfo-1-naphthalenyl)azo]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt

Molecular Formula:	C₃₅H₂₄N₆NaO₈S+	Molecular Weight:	711.655229 [g/mol]
H-Bond Donor:	5	H-Bond Acceptor:	14

InChIKey: IGDVWRXZERGNRK-VYUGFCPPSA-N