Direct Brown 51
Name:C.I.Direct Brown 51,C.I.31710
Molecular Structure: trisazo class
C.I.Direct Brown 51,C.I.31710,CAS 4623-91-0,848.71,C35H23N8Na3O10S2
Molecular Formula:C35H23N8Na3O10S2
Molecular Weight: 848.71
CAS Registry Number:4623-91-0
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding,first coupled with 2-Hydroxybenzoic acid, and then in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, its product to diazo, and Benzene-1,3-diamine coupling.
Properties and Applications: brown olive green light.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3-4 | 4 | 3 | 2 | 3 | ||
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