Acid Green 20

Colour Fastness Test

Appearance is dark green to green light black powder. Soluble in water, slightly soluble in ethanol, insoluble in other organic solvents. Purple in 10% sodium hydroxide solution; blue-green in concentrated sulfuric acid, blue after dilution Color, precipitated; brown solution in concentrated nitric acid. Its aqueous solution is dark blue green, and it turns purple after adding concentrated sodium hydroxide solution.

Dark green light to black powder. Soluble in water and soluble fiber element, slightly soluble in alcohol, insoluble in other organic solvents. Dyes in 10% of sodium hydroxide solution for purple solution; The strong sulfuric acid for blue-ray green, diluted into blue, precipitation; In nitric acid solution for brown. The water solution is dark blue light green, add thick sodium hydroxide solution to purple.

This product is suitable for the wool, silk, wool blended fabric, polyamide fiber of dyeing and printing, also suitable for leather and paper color.

Use condition:

1. Mainly used for dyeing and printing of wool, silk, nylon and wool blend fabrics, and also for leather and paper coloring.

2. The whiteness is medium, the copper ion color is basically unchanged during dyeing, and the light color of the iron ion becomes lighter and darker.