Reactive Yellow 18

Preparation

2-Aminobenzene-1,4-disulfonic acid and 2,4,6-Trichloro-1,3,5-triazine first condensation, and 2,4-Diaminobenzenesulfonic acid second condensation, its product diazo, and 1-(3-Sulfophenyl)-3-methyl-5-pyrazolone?coupling, and then salting-out.

Properties and Applications

colourful green light yellow. Golden yellow powder. The strong sulfuric acid for yellow; In the nitric acid is yellow, no change after diluted. The dye water solution is yellow, with 1 Moore sodium hydroxide solution, continue to add insurance powder and warm, there were no change color, add people had boric acid sodium to colorless. Used for cotton or viscose fiber dyeing, suitable for rolling roll piled up and roll dyeing process. Can be used for cotton or viscose fiber, the dye, direct discharge printing, also can be in silk or viscose filament fabric and printing.