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Acid Yellow 23(CAS 1934-21-0)

Acid Yellow 23

Name:C.I.Acid Yellow 23,C.I.19140

Molecular Structure: Single azo class

 

C.I.Acid Yellow 23,C.I.19140,CAS 1934-21-0,534.37,C16H9N4Na3O9S2,Acid Yellow N,Acid Tartrazine

Molecular Formula:C16H9N4Na3O9S2

Molecular Weight: 534.37

CAS Registry Number:1934-21-0

Manufacturing Methods : Commonly known  Tartmzine  . (a) 4-Aminobenzenesulfonic acid diazo, and 5-Oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic acid coupled; (b) 2 Moore 4-Aminobenzenesulfonic acid and dioxide 5 diacid reaction

Properties and Applications:  yellow. 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 red light deepened. Used for wool, silk, vinegar, polyamide fiber dyeing and printing directly. The Barium salt also used for paper, leather, soap, drug, plastic, aluminium surface shading, can also be used in cosmetics and food coloring.

Standard

Light Fastness

Soaping

Persperation Fastness

Oxygen bleaching

Fastness to seawater

Fading

Stain

Fading

Stain

Fading

Stain

ISO

4

2

5

4-5

1

5

2

3

AATCC

4

2

2

3

1

1

3



 

 

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