Direct Brown 79
- Product Name
- Direct Brown 79
- CAS No.
- 6483-77-8
- Chemical Name
- Direct Brown 79
- Synonyms
- C.I.30050;Direct Brown CN;Direct Brown 79;c.i. direct brown 79;C.I. Direct brown 79(30050);C.I.Direct Brown 79:C.I.30050;2-Hydroxy-5-[[4'-[[2,4-diamino-5-[(2,4-disulfophenyl)azo]phenyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt;trisodium,(3E)-3-[[4-[4-[[2,4-diamino-5-[(2,4-disulfonatophenyl)diazenyl]phenyl]diazenyl]phenyl]phenyl]hydrazinylidene]-6-oxocyclohexa-1,4-diene-1-carboxylate
- CBNumber
- CB3967948
- Molecular Formula
- C31H24N8O9S2.3Na
- Formula Weight
- 785.68
- MOL File
- 6483-77-8.mol
Direct Brown 79 Property
- EPA Substance Registry System
- C.I. Direct Brown 79 (6483-77-8)
Direct Brown 79 Chemical Properties,Usage,Production
Preparation
4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then and 4-Aminobenzene-1,3-disulfonic acid diazo, and Benzene-1,3-diamine coupled to a product matches.
Properties and Applications
brown. Brown powder. Soluble in water for yellow orange brown solution, soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid for violet black, diluted for brown. The dye solution to join thick and strong hydrochloric acid sodium hydroxide solution are generating orange brown precipitation. Cellulose fiber of dyeing, the dye devoured performance is good, temperature in 80 ℃, the largest affinity, discharge the gender is good, hard to sensitive. After dyeing with copper sulfate handling,can improve the dyeing fastness. Dyeing cotton and viscose for yellow brown. Mainly used for dyeing knitting fabric, blankets, flannelette, viscose/silk, Wool / nylon blended fabric dyeing, generally not directly used for printing.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3 | 4 | 2 | 2 | 1-2 | ||