Acid Yellow 61

Chemical Properties

Yellow powder. Easily soluble in water, the solubility in water (90℃) is 35g/L. The aqueous solution is greenish yellow, adding hydrochloric acid turns to tender yellow, adding sodium hydroxide also turns to tender yellow, slightly turbid. In concentrated sulfuric acid, it is dark yellow, the color is unchanged after dilution, accompanied by precipitation. Sensitive to copper and iron ions when dyeing.

Uses

Acid yellow 61 is an acidic yellow dye that can be adsorbed and removed by bentone clay.

Preparation

2-Amino-N-ethyl-N-phenylbenzenesulfonamide diazo, and 2,5-Bichloro-4-(3-methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonic acid coupling.

Flammability and Explosibility

Non flammable

Properties and Applications

yellow. Yellow powder. Soluble in water, in 90 ℃ water solubility of 35 g/L. The strong sulfuric acid dyes for old yellow, diluted the same colour and lustre, precipitation. Its water solution for green light yellow, add hydrochloric acid to tender yellow; Add sodium hydroxide to also to tender yellow, a little cloudy. This product levelness white, and better properties, copper, iron ion of more sensitive, dyeing should be pay attention to. This product used for wool, silk, polyamide fiber and its blended fabric dyeing, also can be used for wool and silk fabric printing, direct discharge printing. Can also be used in leather color.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	5-6	4	4	4			4-5
AATCC	5-6	4-5	4-5	4-5			4-5

References

[1] Baskaralingam P, Pulikesi M, Elango D, et al. Adsorption of acid dye onto organobentonite[J]. Journal of hazardous materials, 2006, 128(2-3): 138-144.