Direct Blue 258
Name:C.I.Direct Blue 258,C.I.34138
Molecular Structure: trisazo class
C.I.Direct Blue 258,C.I.34138,CAS 15792-47-9,877.77,C36H22N7Na3O10S3,Durazol Blue 3R
Molecular Formula:C36H22N7Na3O10S3
Molecular Weight: 877.77
CAS Registry Number:15792-47-9
Manufacturing Methods :3-Aminobenzenesulfonic acid diazo, and Naphthalen-1-amine coupling, again diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, product to diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: dark blue
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 4 | 5 | 3 | 4 | ||
List of Suppliers:
Durazol Blue 3R( Imperial Chemical Industries )