dye|World dye variety

Name:C.I.Direct Red 59,C.I.22420

Molecular Structure: Double azo class

C.I.Direct Red 59,C.I.22420,CAS 6655-94-3,683.61,C32H23N5Na2O8S

Molecular Formula:C₃₂H₂₃N₅Na₂O₈S

Molecular Weight: 683.61

CAS Registry Number:6655-94-3

Manufacturing Methods :  4-(4-Aminophenyl)benzenamine double nitriding, first with 2-Hydroxy-3-methylbenzoic acid coupling, again with  7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications:  blue-ray red. Soluble in water for red orange brown, soluble in ethanol in red. The strong sulfuric acid in the dark for, for the red light brown after diluted. The dye solution to join strong hydrochloric acid for red light brown, have precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation.

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