dye|World dye variety

Name:C.I.Direct Black 40,C.I.31760

Molecular Structure: trisazo class

C.I.Direct Black 40,C.I.31760,CAS 6449-81-6,766.69,C39H24N6Na2O7S,Benzo Grey S

Molecular Formula:C₃₉H₂₄N₆Na₂O₇S

Molecular Weight: 766.69

CAS Registry Number:6449-81-6

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, again with Naphthalen-1-amine coupling, product to diazo, and 4-Hydroxynaphthalene-1-sulfonic acid coupling.

Properties and Applications: Grey

List of Suppliers:

Benzo Grey S( Bayer Group )