Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-5-methylphenyl)azo]-5-nitro-, monosodium salt
- CAS NO.：6408-98-6
- Empirical Formula: C13H11N3O7S.Na
- Molecular Weight: 376.3
- EINECS: 613-458-7
![Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-5-methylphenyl)azo]-5-nitro-, monosodium salt Structural](https://img.chemicalbook.in/CAS/20200119/GIF/6408-98-6.gif)
What is Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-5-methylphenyl)azo]-5-nitro-, monosodium salt?
Preparation
3-Amino-4-hydroxy-5-nitrobenzenesulfonic acid diazotization, and p-Cresol coupling.
Properties and Applications
dark brown. Soluble in water for yellow brown, right amount soluble in ethanol. In concentrated sulfuric acid for yellow brown, dilution for shallow orange. Dye aqueous solution to join concentrated hydrochloric acid for orange; Join concentrated sodium hydroxide solution for orange brown.
| Standard | Ironing Fastness | Light Fastness | Fulling | Persperation Fastness | Soaping | Water | |
| Alkali | Acid | ||||||
| ISO | 4 | 5-6 | 3-4 | 3 | 5 | 4 | |
| AATCC | 4 | 6 | 4 | 5 | 4 | ||
Safety information for Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-5-methylphenyl)azo]-5-nitro-, monosodium salt
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![5-[(3-Carboxy-5-methyl-4-oxo-2,5-cyclohexadien-1-ylidene)(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)methyl]-2-hydroxy-3-methylbenzoic acid](https://img.chemicalbook.in/CAS/GIF/6411-50-3.gif)
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