Direct Red 77
Name:C.I.Direct Red 77,C.I.28110
Molecular Structure: Double azo class
C.I.Direct Red 77,C.I.28110,CAS 5873-19-8,676.03,C26H20ClN5Na2O8S2
Molecular Formula:C26H20ClN5Na2O8S2
Molecular Weight: 676.03
CAS Registry Number:5873-19-8
Manufacturing Methods : 2-Amino-5-chlorobenzenesulfonic acid diazo, and 2,5-Dimethylbenzenamine coupling, its product to diazo, and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: red. Soluble in water for product red to purplish red color, soluble in ethanol in red. The strong sulfuric acid for Tracy in blue, Red sauce for diluted to Red light brown, with purple precipitation; In the nitric acid purple brown precipitation. The dye solution to join strong hydrochloric acid for red sauce; Add thick sodium hydroxide solution for purple; Add 10% sodium hydroxide solution micro change to blue.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3-4 | 5 | 5 | 1 | 1 | ||
| AATCC | 1 | 4 | 3-4 | 1 | 1 | ||
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