dye|World dye variety

Name:C.I.Direct Blue 149,C.I.28350

Molecular Structure: Double azo class

C.I.Direct Blue 149,C.I.28350,CAS 5905-21-5,994.78,C42H26N6Na4O14S2,Benzo Fast Copper Blue F3G

Molecular Formula:C₄₂H₂₆N₆Na₄O₁₄S₂

Molecular Weight: 994.78

CAS Registry Number:5905-21-5

Manufacturing Methods :  5-Amino-2-hydroxybenzoic acid diazo, and 2-(1-Amino-6-sulfonaphthalen-2-yloxy)acetic acid coupling, again diazo, and 6-(4-Benzamidoanilino)-1-naphthol-3-sulfonic acid coupling (finally coupling is with aqueous ammonia in Pyridine medium).

Properties and Applications: green light blue. Soluble in water for blue, slightly soluble in alcohol. In the dark for the strong sulfuric acid, diluted green solution for blue-ray, accompanied by precipitation. The dye solution to join strong hydrochloric acid have dark blue light green precipitation; With strong sodium hydroxide solution for blue light green, precipitation.

List of Suppliers:

Benzo Fast Copper Blue F3G( Bayer Group )