dye|World dye variety

Name:C.I.Direct Black 24,C.I.31925

Molecular Structure: trisazo class

C.I.Direct Black 24,C.I.31925,1014.9,C44H29N6Na3O13S3,Benzo Chrome Black N

Molecular Formula:C₄₄H₂₉N₆Na₃O₁₃S₃

Molecular Weight: 1014.9

CAS Registry Number:

Manufacturing Methods :  3,3′-Dimethylbenzidine double nitriding, first with 8-Aminonaphthalene-2-sulfonic acid coupling, product to diazo, and 4,5Dihydroxynaphthalene-1-sulfonic acid (2 Moore) coupled.

Properties and Applications:  black. Soluble in water for dark purple, soluble in ethanol. The strong sulfuric acid for blue, shallow purple for diluted. The dye solution to join strong hydrochloric acid have dark purple precipitation; Add thick sodium hydroxide solution have dark purple precipitation.

List of Suppliers:

Benzo Chrome Black N(  Bayer Group )