Direct Blue 230
Name:C.I.Direct Blue 230,C.I.22455
Molecular Structure: Double azo class
C.I.Direct Blue 230,C.I.22455,CAS 6527-65-7,815.7,C32H20N5Na3O11S3
Molecular Formula:C32H20N5Na3O11S3
Molecular Weight: 815.7
CAS Registry Number:6527-65-7
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, and then and 4-Hydroxynaphthalene-1-sulfonic acid coupling.
Properties and Applications: blue
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 5 | 4 | 1-2 | 1-2 | 1-2 | ||
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