Direct Green 38
Name:C.I.Direct Green 38,C.I.28280
Molecular Structure: Double azo class
C.I.Direct Green 38,C.I.28280,CAS 5893-32-3,969.69,C35H23Cl2N6Na3O12S3,Phenazol Brill Green
Molecular Formula:C35H23Cl2N6Na3O12S3
Molecular Weight: 969.69
CAS Registry Number:5893-32-3
Manufacturing Methods : 4-Amino-2,5-dichlorobenzenesulfonic acid diazo, and 5-Amino-7-ehtoxy-2-naphthalenesulfonic acidcoupling, its product to diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: green. Soluble in water for green light blue, slightly soluble in ethanol, easily soluble in soluble fiber element, insoluble in other organic solvents. In the dark for the strong sulfuric acid, diluted to blue, green precipitation; In nitric acid solution for brown, then become yellow. The dye solution to join strong hydrochloric acid blue precipitation; Add thick sodium hydroxide solution for blue precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 3-4 | 2 | 3-4 | 4 | ||
| AATCC | 5 | 5 | 2 | 2-3 | 5 | ||
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Phenazol Brill Green( Classic Dyestuffs Inc )