3-[(5-Chloro-2-hydroxy-4-nitrophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt
- CAS NO.：5850-66-8
- Molecular Weight: 0
![3-[(5-Chloro-2-hydroxy-4-nitrophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt Structural](https://img.chemicalbook.in/CAS/GIF/5850-66-8.gif)
What is 3-[(5-Chloro-2-hydroxy-4-nitrophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt?
Preparation
2-Amino-4-chloro-5-nitrophenol diazotization, with 4,5-Dihydroxynaphthalene-2,7-disulfonic acid coupling.
Properties and Applications
deep green light blue. Soluble in water for purple, slightly soluble in alcohol. In concentrated sulfuric acid for blue to black, dilution after pink to purple. Dye aqueous solution to join concentrated hydrochloric acid for magenta; Join strong caustic for red light blue.
| Standard | Ironing Fastness | Light Fastness | Fulling | Persperation Fastness | Soaping | Water | |
| Alkali | Acid | ||||||
| ISO | 5 | 5-6 | 5 | 2 | 3 | 4 | 4-5 |
| AATCC | 5 | 5-6 | 5 | 5 | 5 | 5 | |
Safety information for 3-[(5-Chloro-2-hydroxy-4-nitrophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt
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![5-[(2-Chloro-4-nitrophenyl)[3-methyl-4-oxo-5-(sodiooxycarbonyl)-2,5-cyclohexadien-1-ylidene]methyl]-2-hydroxy-3-methylbenzoic acid sodium salt](https://img.chemicalbook.in/CAS/GIF/10143-02-9.gif)
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