Name:C.I.Direct Black 15,C.I.22620

Molecular Structure: Double azo class
 
C.I.Direct Black 15,C.I.22620,CAS 6426-75-1,858.76,C34H25N6Na3O11S3,Diphenyl Blue Black

Molecular Formula:C34H25N6Na3O11S3

Molecular Weight: 858.76

CAS Registry Number:6426-75-1

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, and then in alkaline conditions and 6-(Ethylamino)-4-hydroxynaphthalene-2-sulfonic acid coupling.