Direct Black 87
Name:C.I.Direct Black 87,C.I.24110
Molecular Structure: Double azo class
Molecular Formula:C34H26N6Na2O8S2
Molecular Weight: 756.72
CAS Registry Number:8015-03-0
Manufacturing Methods : 3,3′-Dimethoxylbenzidine double nitriding, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid (2 Moore) coupled.
Properties and Applications: blue and black. Soluble in water for red orange brown, soluble in ethanol in red. The strong sulfuric acid for blue-ray purple, diluted to blue. The dye solution to join strong hydrochloric acid as dark blue, precipitation; Add thick sodium hydroxide solution for the red color, have precipitation.
Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
Fading | Stain | Fading | Stain | ||||
ISO | 4 | 5 | 3 | 3 | 3-4 |
List of Suppliers:
Diazurine B ( Bayer Group )