| Molecular Formula | C52H34Cl2N18O20S6.6Na |
| Physical and Chemical Properties | Chemical properties brown yellow uniform powder. The solubility in water (50 ℃) is 25g/L. The aqueous solution is dark yellow, add 1mol/L sodium hydroxide solution to turn yellow, then add hydrosulfite and warm to turn light yellow, and add sodium perborate to still be light yellow. It is dark yellow in concentrated sulfuric acid, and it is still dark yellow after dilution. It is yellow in concentrated nitric acid and turns dark yellow after dilution. |
| Use | Uses active light yellow KE-3G is mainly used for dyeing cotton and viscose fiber, and is used for viscose fiber. It is also used for direct printing of cotton and viscose fabrics, and dyeing of silk, diacetate fiber and vinylon. Levelness and dyeing properties were better. It can also be used for dyeing polyester/cotton blended fabrics in the same bath with disperse dyes. The dyed product can be treated with fixing agent Y to improve the washing fastness. |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
introduction
active yellow KE-3G is also called active yellow 81, which is a uniform brown yellow powder. The solubility in water (50 ℃) is 25g/L. The aqueous solution is dark yellow, add 1mol/L sodium hydroxide solution to turn yellow, then add hydrosulfite and warm to turn light yellow, and add sodium perborate to still be light yellow. Mainly used for dyeing cotton and viscose fibers, mostly for viscose fibers. It is also used for direct printing of cotton and viscose fabrics, as well as dyeing of silk, diacetate and vinylon.
production method
Using DSD acid (diaminostilbene disulfonic acid), cyanuric chloride, 2,4-diaminobenzenesulfonic acid and 1-(4'-sulfophenyl)-3-methyl-5-pyrazolone as raw materials, DSD acid is first condensed with cyanuric chloride, and then with 2, 4-diaminobenzenesulfonic acid for a second condensation, and then the condensation product is double nitrided, the product is coupled with 1-(4 '-sulfophenyl)-3-methyl -5-pyrazolone. The finished product is salted out, filtered and dried.