Direct Black 91

product Name Direct Black 91 Synonyms C.I. 30400; C.I. Direct Black 21, trisodium salt; C.I. Direct Black 91; Benzoic acid, 2-(2-(2-amino-6-(2-(4'-(2-(3-carboxy-4-hydroxyphenyl)diazenyl)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)diazenyl)-5-hydroxy-7-sulfo-1-naphthalenyl)diazenyl)-5-nitro-, sodium salt (1:3); trisodium 2-{(E)-[(6E)-2-amino-6-(2-{4'-[(2Z)-2-(3-carboxylato-4-oxocyclohexa-2,5-dien-1-ylidene)hydrazinyl]-3,3'-dimethoxybiphenyl-4-yl}hydrazinylidene)-5-oxo-7-sulfonato-5,6-dihydronaphthalen-1-yl]diazenyl}-5-nitrobenzoate; trisodium 2-[[2-amino-6-[4-[4-(3-carboxylato-4-hydroxy-phenyl)azo-3-methoxy-phenyl]-2-methoxy-phenyl]azo-5-hydroxy-7-sulfonato-1-naphthyl]azo]-5-nitro-benzoate Molecular Formula C38H25N8Na3O13S Molecular Weight 902.6852 InChI InChI=1/C38H28N8O13S.3Na/c1-58-31-13-18(3-9-28(31)42-40-20-5-12-30(47)25(15-20)38(51)52)19-4-10-29(32(14-19)59-2)43-45-35-33(60(55,56)57)17-23-22(36(35)48)7-8-26(39)34(23)44-41-27-11-6-21(46(53)54)16-24(27)37(49)50;;;/h3-17,47-48H,39H2,1-2H3,(H,49,50)(H,51,52)(H,55,56,57);;;/q;3*+1/p-3 CAS Registry Number 6739-62-4 EINECS 229-801-5 Molecular Structure

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