Pigment Yellow 100
Name:C.I.Pigment Yellow 100,C.I.19140:1
Molecular Structure: Single azo
C.I.Pigment Yellow 100,C.I.19140:1,CAS 12225-21-7,468.42,C16H12N4O9S2,Eurolake Tartrazine,Neelilake Tartrazine,Tartrazine Lake,Tartrazine
Molecular Formula:C16H12N4O9S2
Molecular Weight: 468.42
CAS Registry Number:12225-21-7
Manufacturing Methods :(a) 4-Aminobenzenesulfonic acid diazotization, with 5-Oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic acid coupling, and then convert it to aluminum salt; (b) 2 Moore 4-Hydrazinobenzenesulfonic acid and Oxobutanedioic acid reaction, and then convert it to aluminum salt.
Properties and Applications:green yellow. Slightly soluble in ethanol and Cellosole, insoluble in other organic solvent. In concentrated sulfuric acid to yellow, after diluted solution for yellow; In concentrated nitric acid for yellow solution. Its aqueous solution to join hydrochloric acid don’t change color; Join concentrated sodium hydroxide solution for red light yellow.
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