Direct Violet 28
Name:C.I.Direct Violet 28,C.I.23685
Molecular Structure: Double azo class
Molecular Formula:C34H24N4Na2O8S2
Molecular Weight: 726.69
CAS Registry Number:6420-06-0
Manufacturing Methods : 3,3′-Dimethylbenzidine double nitriding, and 4-Hydroxynaphthalene-1-sulfonic acid (1 Moore) and 5-Hydroxynaphthalene-1-sulfonic acid (1 Moore) coupled.
Properties and Applications: dark blue purple.
Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
Fading | Stain | Fading | Stain | ||||
ISO | 4 | 1 | 1 | 2 |
List of Suppliers:
Azo Blue( IG Farbenindustrie AG )