Direct Brown 75
Name:C.I.Direct Brown 75,C.I.30325
Molecular Structure: trisazo class
C.I.Direct Brown 75,C.I.30325,CAS 1324-84-1,883.75,C39H24N7Na3O10S2
Molecular Formula:C39H24N7Na3O10S2
Molecular Weight: 883.75
CAS Registry Number:1324-84-1
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, and 2-Hydroxybenzoic acid coupling, and then and Naphthalen-1-amine diazo, Coupled with 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling product obtained.
Properties and Applications: dark red light brown. The strong sulfuric acid for red light blue, purple solution for red after diluted, precipitation; In the nitric acid for brown. The dye solution to join strong hydrochloric acid have dark purple precipitation; Add thick sodium hydroxide solution is palm red light.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 4-5 | 1-2 | 1-2 | 3 | ||
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