dye|World dye variety

Name:C.I.Food Blue 5,C.I.42051

Molecular Structure: triarylmethane class

C.I.Food Blue 5,C.I.42051,CAS 3536-49-0,560.86,C27H32N2O7S2,PuriColor Blue FBL5

Molecular Formula:C₂₇H₃₂N₂O₇S₂

Molecular Weight: 560.86

CAS Registry Number:3536-49-0

Manufacturing Methods :(a) 3-Nitrobenzaldehyde and N,N-diethylbenzenamine (2 Moore) condensation, and then reduction, and will be on the product by diazo, then transformed into hydroxyl, again two stlfonation, finally will product into calcium salt and segregation and oxidation;

(b)3-Hydroxybenzaldehyde and  N,N-diethylbenzenamine (2 Moore) condensation, then the second cross, melt into calcium salt and oxidation.

Properties and Applications: colourful green light blue. Soluble in water for blue, slightly soluble in ethanol for green light blue. The strong sulfuric acid for brown-olive yellow, yellow for deep diluted, and then to green. Dyes to join sodium hydroxide solution of the same color, heat into deep purple. And C.I. Acid blue 3 the same chemical structure.

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