Direct Blue 239
Name:C.I.Direct Blue 239,C.I.34175
Molecular Structure: trisazo class
C.I.Direct Blue 239,C.I.34175,CAS 6428-55-3,892.78,C36H23N8Na3O10S3,Benzamin Dark Blue BLS
Molecular Formula:C36H23N8Na3O10S3
Molecular Weight: 892.78
CAS Registry Number:6428-55-3
Manufacturing Methods : 2-(4-Aminophenylamino)-2-oxoacetic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, again diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, product to diazo, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, and then 2-(4-Aminophenylamino)-2-oxoacetic acid hydrolysis base
Properties and Applications: blue
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 5 | 4-5 | 5 | 4-5 | 4 | 5 | 5 |
List of Suppliers:
Benzamin Dark Blue BLS( Bayer Group )