Direct Brown 24
Name:C.I.Direct Brown 24,C.I.31700
Molecular Structure: trisazo class
C.I.Direct Brown 24,C.I.31700,CAS 8003-74-5,730.66,C35H24N8Na2O6S
Molecular Formula:C35H24N8Na2O6S
Molecular Weight: 730.66
CAS Registry Number:8003-74-5
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and Benzene-1,3-diamine coupling.
Properties and Applications: dark red light brown. Soluble in water for brown, and adequate soluble in alcohol for red sauce. In the dark for the strong sulfuric acid, diluted for olive brown. The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution have orange brown precipitation
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3 | 4-5 | 2 | 2-3 | 3 | ||
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