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Direct Brown 7
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4-(4-Aminophenyl)benzenamine double nitriding, and 2,4-Diamino-5-methylbenzenesulfonic acid coupling, and then and 4-Aminobenzenesulfonic aciddiazo, and Benzene-1,3-diamine coupled to accidentally coupled nitrogen compounds.Properties and Applications
brown. Soluble in water for orange brown, soluble in ethanol is palm yellow light. The strong sulfuric acid for sauce red to red light brown, for yellow brown after diluted. The dye solution to join strong hydrochloric acid have yellow olive brown precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation.| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| AATCC | 1 | 4 | 2 | 3 | 2 | ||
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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
Direct Brown 73
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