dye|World dye variety

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.

Properties and Applications: navy blue light to dark. Soluble in water for dark, soluble in ethanol. The strong sulfuric acid for blue, dilute after dark purple precipitation. Dye with hydrochloric acid solution has the purple precipitation; Add sodium hydroxide solution for dark purple.

List of Suppliers:

Diphenyl Blue Black( Geigy Co. Ltd )