Direct Blue 157
- CAS No.
- Chemical Name:
- Direct Blue 157
- Synonyms
- Direct Blue 157;C.I.Direct Blue 157:C.I.31680
- CBNumber:
- CB89702912
- Molecular Formula:
- Molecular Weight:
- 0
- MDL Number:
- MOL File:
- Mol file
Direct Blue 157 Chemical Properties,Uses,Production
Preparation
2′-Methoxy-4′-amino-5′-chlorooxanilic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, product to diazo, and 7-Hydroxynaphthalene-2-sulfonic acid coupling, and then 2-(4-Aminophenylamino)-2-oxoacetic acid hydrolysis base, again diazo, and 4,5Dihydroxynaphthalene-1-sulfonic acid coupling.
Properties and Applications
dark blue. Soluble in water for blue, soluble in ethanol. concentrated sulfuric acid in olive green, diluted to blue. The dye solution with strong hydrochloric acid blue precipitation; Add thick dark for sodium hydroxide solution.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3-4 | 2-3 | 4 | 2-3 | 3-4 | ||
Direct Blue 157 Preparation Products And Raw materials
(Direct Blue 157)Related Search:
Direct Sky Blue FB
3,3'-[(3,3'-Dimethoxy-1,1'-biphenyl-4,4'-diyl)bis(azo)]bis[7-amino-4-hydroxy-2-naphthalenesulfonic acid]disodium salt
tetrasodium 2,2'-[[4,4'-bis[[1-hydroxy-6-[(4-methoxyphenyl)amino]-3-sulphonato-2-naphthyl]azo][1,1'-biphenyl]-3,3'-diyl]bis(oxy)]diacetate
tetrasodium 5,5'-[iminobis[(1-hydroxy-3-sulphonato-6,2-naphthylene)azo(5-methoxy-2-methyl-4,1-phenylene)azo]]bis(salicylate)
Acetic acid, 2,2'-[[4,4'-bis[(6-amino-5-chloro-1-hydroxy-3-sulfo-2-naphthalenyl)azo][1,1'-biphenyl]-3,3'-diyl]bis(oxy)]bis-, tetrasodium salt
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Direct Blue 157
C.I.Direct Blue 157:C.I.31680