Direct Red 85
Name:C.I.Direct Red 85,C.I.28180
Molecular Structure: Double azo class
C.I.Direct Red 85,C.I.28180,CAS 5873-26-7,703.65,C31H23N5Na2O8S2
Molecular Formula:C31H23N5Na2O8S2
Molecular Weight: 703.65
CAS Registry Number:5873-26-7
Manufacturing Methods : 4-Amino-3-methylbenzenesulfonic acid diazo, coupled with m-Toluidine, its product to diazo, and 7-Benzamido-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: blue-ray red. Soluble in water and ethanol is cherry red. The strong sulfuric acid for blue-ray green, red after diluted purple precipitation. The dye solution to join strong hydrochloric acid has the purple precipitation; Add thick sodium hydroxide solution has the purple precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4-5 | 3-4 | 5 | 1-2 | 1-2 | ||
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