Direct Brown 73

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Direct Brown 73 Basic information
Product Name:Direct Brown 73
Synonyms:Direct Brown 73;C.I.Direct Brown 73:C.I.35535
CAS:
MF:
MW:0
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Mol File:Mol File
Direct Brown 73 Structure
Direct Brown 73 Chemical Properties
Safety Information
MSDS Information
Direct Brown 73 Usage And Synthesis
Preparation4-(4-Aminophenyl)benzenamine double nitriding,first coupled with 2-Hydroxybenzoic acid, and then in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidcoupling, product to diazo, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, its product to diazo, and Benzene-1,3-diamine coupling.
Properties and Applicationsred light brown. Soluble in water for brown. The strong sulfuric acid for purple brown, for yellow brown solution diluted, accompanied by precipitation. The dye solution to join strong hydrochloric acid have dark brown precipitation; Add thick sodium hydroxide solution for brown.
Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4-5 3 3 4-5 4
Tag:Direct Brown 73 Related Product Information
Direct Brown 7 C.I. Direct brown 75 DIRECT BROWN 74 6-Amino-3-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulfophenyl)azo]phenyl]azo]-1,1'-biphenyl-4-yl]azo]-4-hydroxy-2-naphthalenesulfonic acid disodium salt Direct Brown 69 C.I. Direct Brown 67 Direct Brown 78 Direct Brown 70 4,4'-[(2-Methyl-5-sodiosulfo-1,3-phenylene)bis[azo(4,6-diamino-3,1-phenylene)azo]]bis[naphthalene-1-sulfonic acid sodium] salt