Basic Yellow 21

製造方法

2-(1,3,3-Trimethylindolin-2-yl)acetaldehyde And 2-Methyl-2H-indazole??in the presence of phosphorus oxychloride of condensation, and then quaternized..

Properties and Applications

colourful green light yellow. Bright yellow powder. Soluble in water. In the strong sulfuric acid of bright orange, diluted into green light yellow. In 120 ℃ high temperature dyeing, colored light unchanged. Copper ions in dyeing color shade unchanged, encounter iron ion colour and lustre micro have change. Compatibility value is 2.5, the f value is 0.29. Solubility of 40 g/L, effected by temperature is very small. Mainly used in acrylic dyeing, also can be in acrylic fiber directly on printing.