dye|World dye variety

Name:C.I.Direct Blue 29,C.I.27890

Molecular Structure: Double azo class

C.I.Direct Blue 29,C.I.27890,736.64,C30H22N6Na2O10S2,Icyl Blue 2R

Molecular Formula:C₃₀H₂₂N₆Na₂O₁₀S₂

Molecular Weight: 736.64

CAS Registry Number:

Manufacturing Methods :  2-Amino-5-nitrobenzenesulfonic acid diazo, and 2-Amino-4-methylanisole coupling, again diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.

Properties and Applications: blue-ray red. Soluble in water and ethanol is purple. The strong sulfuric acid for yellow green, diluted is shallow brown. The dye solution to join strong sodium hydroxide solution for blue light green, a black light blue precipitation.

List of Suppliers:

Icyl Blue 2R ( Imperial Chemical Industries )