Direct Blue 51
Name:C.I.Direct Blue 51,C.I.30340
Molecular Structure: trisazo class
C.I.Direct Blue 51,C.I.30340,CAS 6360-65-2,1003.71,C38H23Cl2N8Na3O11S3,Chloramine Blue HW
Molecular Formula:C38H23Cl2N8Na3O11S3
Molecular Weight: 1003.71
CAS Registry Number:6360-65-2
Manufacturing Methods : 2,5-Dichlorobenzenamine diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, 4-(4-Aminophenyl)benzenamine double nitriding, first in alkaline conditions and formation of accidentally nitrogen compounds and then in alkaline conditions and 3-Hydroxynaphthalene-2,7-disulfonic acid coupling.
Properties and Applications: navy blue light to dark. Soluble in water to blue. The strong sulfuric acid in blue, purple and blue after diluted precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3 | 4-5 | 4 | 2 | 2-3 | ||
List of Suppliers:
Chloramine Blue HW( Sandoz Ltd )