Molecular Formula | C40H23Cl2N15Na6O19S6 |
Molar Mass | 1418.93434 |
Appearance | Powder |
Color | Dark blue |
Physical and Chemical Properties | Reactive dark green KE-4BD is a black (or dark green) powder. The solubility in water (50 °c) is 65g/L. The aqueous solution was dark blue-green in color, and 1mol/L sodium hydroxide solution was added to turn blue, followed by addition of sodium hydrosulfite and warming to colorless, followed by addition of sodium perborate to remain colorless. In concentrated sulfuric acid was dark green, diluted dark crab cyan. It was purple in concentrated nitric acid and turned black-brown after dilution. |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36 - Irritating to the eyes |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
WGK Germany | 3 |
introduction | active dark green KE-4BD is also called active green 19. There are many reports that there are a variety of strains can be degraded, such as double enzyme Clostridium, Shiwanella and Leria verrucosa. |
use | reactive green KE-4B is suitable for dyeing cotton and viscose fibers. dip dyeing, roll dyeing and pad dyeing can be used, with high dye uptake and fixation rates. It is also used for direct weaving of cotton and viscose fiber fabrics, and the fixation rate can reach more than 90%. It is also used for dyeing hemp, polyester cotton and polyester viscose fabrics. for dyeing and printing of cotton fibers for dyeing of cotton and hemp fabrics |
production method | active dark green KE-4BD can be made of h acid, p-nitroaniline o-sulfonic acid, cyanuric chloride and p-aminobenzenesulfonic acid as raw materials. first, p-nitroaniline o-sulfonic acid is diazotized, coupled with h acid, reduced by sodium sulfide, condensed with cyanuric chloride for the first time, and then condensed with p-aminobenzenesulfonic acid for the second time to obtain the product. The finished product is salted out, filtered and dried. |