4-amino-1,1'-azobenzene-3,4'-disulfonic acid

CAS NO:6428-31-5

EC NO:229-208-1

Molecular Formula:C₃₄H₂₇N₁₃Na₂S₂O₇

Molecular Weight:839.77

Synonyms:;C.I. 35255;C.I. Direct Black 19;C.I. Direct Black 19 (VAN);C.I. Direct Black 19, disodium salt;Direct Fast Black G;C.I.Direct Black 19;disodium (3E)-5-amino-6-[(E)-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}diazenyl]-3-(2-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}hydrazinylidene)-4-oxo-3,4-dihydronaphthalene-2,7-disulfonate;(3E)-5-amino-6-[(E)-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}diazenyl]-3-(2-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}hydrazinylidene)-4-oxo-3,4-dihydronaphthalene-2,7-disulfonic acid;Direct Black G;

Molecular Structure:

CAS NO:2706-28-7

EC NO:220-293-0

Molecular Formula:C₁₂H₁₁N₃NaO₆S₂

Molecular Weight:380.352

Synonyms:;C.I. 13015;C.I. Acid Yellow 9;C.I. Food Yellow 2;C.I. Acid Yellow 9, disodium salt (8CI);4-Amino-1,1-azobenzene-3,4-disulfonic acid sodium salt;disodium 4-aminoazobenzene-3,4-disulfonate;Food yellow;ACID YELLOW 147;disodium 2-amino-5-[(E)-(4-sulfonatophenyl)diazenyl]benzenesulfonate;benzenesulfonic acid, 2-amino-5-[(E)-(4-sulfophenyl)azo]-, monosodium salt;Acid Yellow 9;

Molecular Structure: