Acid Yellow 23:1
Name:C.I.Acid Yellow 23:1,C.I.19140:1
Molecular Structure: Single azo class
C.I.Acid Yellow 23:1,C.I.19140:1,CAS 68921-41-5,488.39,C16H12N4O9S2,Tartrazine Lake
Molecular Formula:C16H12N4O9S2
Molecular Weight: 488.39
CAS Registry Number:68921-41-5
Manufacturing Methods : (a) 4-Aminobenzenesulfonic acid diazo, and 5-Oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic acid coupling, and then translate into aluminum salt; (b) 2 Moore 4-Aminobenzenesulfonic acid and Oxalacetic acid reaction, and then translate into aluminum salt.
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.
List of Suppliers:
Tartrazine Lake ( Warner-Jenkinson Co )