Basic information
CAS NO
6428-31-5
EINECS
229-208-1
Molecular Formula
C34H27N13Na2S2O7
Molecular Weight
839.77
English Name
Direct Black 19
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
Physical and Chemical Properties
Density
1.727g/cm3
Refractive index
1.817
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