Direct Violet 57
Name:C.I.Direct Violet 57,C.I.27865
Molecular Structure: Double azo class
C.I.Direct Violet 57,C.I.27865,CAS 6227-12-9,843.75,C34H24N5Na3O11S3,Chlorantine Fast Violet 8BLL
Molecular Formula:C34H24N5Na3O11S3
Molecular Weight: 843.75
CAS Registry Number:6227-12-9
Manufacturing Methods : 4-Amino-5-hydroxynaphthalene-2,7-disulfonic aciddiazo, and 2,5-Dimethylbenzenamine coupling, its product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications: blue purple. Soluble in water for blue purple, slightly soluble in alcohol. The strong sulfuric acid for green light blue, purple precipitation after diluted. The dye solution to join strong hydrochloric acid has the purple precipitation; Add thick sodium hydroxide solution for purple.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4-5 | 4-5 | 5-6 | 3 | 3-4 | ||
List of Suppliers:
Chlorantine Fast Violet 8BLL ( Ciba Specialty Chemicals Inc )