Direct Blue 69
Name:C.I.Direct Blue 69,C.I.34210
Molecular Structure: trisazo class
C.I.Direct Blue 69,C.I.34210,CAS 6548-32-9,1105.97,C46H27N7Na4O13S4,Sirius Light Blue BR
Molecular Formula:C46H27N7Na4O13S4
Molecular Weight: 1105.97
CAS Registry Number:6548-32-9
Manufacturing Methods : 3-Aminonaphthalene-1,5-disulfonic acid diazo, and Naphthalen-1-amine coupling, its product to diazo, and 8-Aminonaphthalene-2-sulfonic acid coupling, again diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications: red light navy blue. Soluble in water for blue, slightly soluble in ethanol for Light gray Light purple, insoluble in other organic solvents. The strong sulfuric acid for gray Light black, diluted for purple. The dye solution to join strong hydrochloric acid have precipitation of dark; Sodium hydroxide solution to join a purple precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 4-5 | 5 | 3 | 3 | ||
List of Suppliers:
Sirius Light Blue BR( Bayer Group )