Direct Brown 190
- Product Name
- Direct Brown 190
- Chemical Name
- Direct Brown 190
- Synonyms
- Direct Brown 190;C.I.Direct Brown 190:C.I.31750
- CBNumber
- CB59702951
- Formula Weight
- 0
- MOL File
- Mol file
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Direct Brown 190 Chemical Properties,Usage,Production
Preparation
4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid , and then in alkaline conditions 6-Amino-4-hydroxynaphthalene-2-sulfonic acid? coupling, product diazo again, and Resorcinol coupling.
Properties and Applications
red light brown. Soluble in water, ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid in the dark for the light blue, diluted red brown for solution, accompanied by precipitation. The dye solution to join 10% sulfuric acid as pale blue light red jujube; Add thick sodium hydroxide solution for blue-ray purplish red color.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| AATCC | 3 | 5 | 2 | 2 | 2 | ||
Direct Brown 190 Preparation Products And Raw materials
Raw materials
Preparation Products
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sodium 2,6-bis[(2,4-diaminophenyl)azo]toluene-4-sulphonate
5-[[4'-[[3-[(3-Carboxy-2-hydroxy-5-sulfophenyl)azo]-2,6-dihydroxyphenyl]azo]-1,1'-biphenyl-4-yl]azo]-2-hydroxybenzoic acid trisodium salt
2-Hydroxy-5-[[4'-[[2,6-dihydroxy-3-[[2-hydroxy-5-(aminosulfonyl)phenyl]azo]phenyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid sodium salt