Name:C.I.Direct Blue 149,C.I.28350
Molecular Structure: Double azo class
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.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Benzo Fast Copper Blue F3G( Bayer Group )