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Food Yellow 4:1

Name:C.I.Food Yellow 4:1,C.I.19140:1

Molecular Structure: Single azo class

C.I.Food Yellow 4:1,C.I.19140:1,CAS 12225-21-7,C16H12N4O9S2,468.42

C.I.Food Yellow 4:1,C.I.19140:1,CAS 12225-21-7,C16H12N4O9S2,468.42

Molecular Formula:C16H12N4O9S2

Molecular Weight: 468.42

CAS Registry Number:12225-21-7

Manufacturing Methods :  4-Aminobenzenesulfonic acid diazo, and 5-Oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic acid coupled into aluminum salt deposit into color.

Properties and Applications: yellow. Yellow fine powder. Hardly soluble in water, oil and most organic solvents, but can be scattered, mixed with water, oil and other liquid and solid powder. Heat resistance, resistance to light sex, oil resistance, salt tolerance, C.I. Food Yellow 4 better than sex. The product is made of a certain amount of HCL again with phosphoric acid potassium hydrogen two solution diluted, the maximum absorption wavelength for 428 + 2 nm.

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