Acid Yellow 23

Colour Fastness Test

Soluble in water for yellow, slightly soluble in ethanol and soluble fiber. element, insoluble in other organic solvents. The strong sulfuric acid for yellow, yellow solution diluted; In nitric acid solution for yellow. Its water solution with hydrochloric acid discoloration; Add sodium hydroxide is redlight deepened. Used for wool, silk, vinegar, polyamide fiber dyeing and printing directly. 

Appearance is yellow powder. Soluble in water, solubility 50g / L (90 ° C), soluble in water yellow. Slightly soluble in ethanol and cellosolve, insoluble in other organic solvents. Red in concentrated sulfuric acid, after dilution There is a yellow solution; it is a yellow solution in concentrated nitric acid. Its aqueous solution plus hydrochloric acid does not change color.

The Barium salt also used for paper, leather, soap, drug, plastic, aluminium surface shading, can also be used in cosmetics and food coloring.

Acid Yellow 23 Use condition:

(1) It is used for dyeing and direct printing of wool, silk, acetate fiber, nylon, and its bismuth salt is used for coloring paper, leather, soap, medicine, plastic, and aluminum surface.

(2) Dyeing can be carried out in a dye bath with a pH of 4 to 7. The dyeing temperature is 70-90 ° C. Wool dyeing is carried out in a formic acid or sulfuric acid bath, and the Canadian dollar powder helps to level the dye; the silk dye is in the acetic acid bath. In progress.