Properties and Applications
red light brown. Soluble in water for brown, soluble in ethanol and Cellosolve, insoluble in other organic solvent. In concentrated sulfuric acid for red, after diluted solution for orange red, and accompanied by precipitation; In concentrated nitric acid for orange solution, and then become yellow, In 10% sodium hydroxide solution for red orange.
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Standard
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Ironing Fastness
|
Light Fastness
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Fulling
|
Persperation Fastness
|
Soaping
|
Water
|
|
Alkali
|
Acid
|
|
ISO
|
4
|
6-7
|
5
|
2-3
|
5
|
5
|
5
|
|
AATCC
|
3-4
|
6
|
4
|
|
5
|
4
|
5
|
![dipotassium 3-[[5-(tert-butyl)-2-hydroxyphenyl]azo]-2-hydroxy-5-nitrobenzenesulphonate Structure](https://www.chemicalbook.com/CAS/GIF/6408-99-7.gif)