Acid Red 6

Colour Fastness Test

Soluble in water for big red, on 90 ℃ water solubility of 80 g/L, soluble in ethanol in red. Dye of sulfuric acid in a cherry red, diluted into red. Its water solution and strong hydrochloric acid into red, precipitation; Add thick sodium hydroxide solution to orange. Discharge of copper, iron ion in color shade darker. 

The appearance is yellow red powder. It is soluble in water and is red. The solubility in water is 80g/L (90°C), soluble in ethanol. It is red in case of concentrated sulfuric acid, and turns red after dilution. The concentrated hydrochloric acid turned red and precipitated; after adding concentrated sodium hydroxide solution, it turned orange.

This applies to goods wool, silk and their blended fabric dyeing, and can be directly on the wool and silk printing.

It is mainly used for dyeing and direct printing of wool, silk and its blended fabrics. It has good extractability. When it is dyed, it will be darkened by copper and iron ions.