dye|World dye variety

Name:C.I.Direct Blue 43,C.I.30205

Molecular Structure: trisazo class

C.I.Direct Blue 43,C.I.30205,CAS 7273-59-8,1081.86,C38H23N9Na4O16S4,Triazol Dark Blue B

Molecular Formula:C₃₈H₂₃N₉Na₄O₁₆S₄

Molecular Weight: 1081.86

CAS Registry Number:7273-59-8

Manufacturing Methods : 2-Amino-5-nitrobenzenesulfonic acid diazo, in acid conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, 4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, and then in alkaline conditions and formation of accidentally coupled nitrogen compounds.

Properties and Applications: dark red light blue to navy blue. Soluble in water for the navy, slightly soluble in alcohol. The strong sulfuric acid for blue, for purple diluted. The dye solution to join strong hydrochloric acid for deep purple; Add thick sodium hydroxide solution for deep purple.

List of Suppliers:

Triazol Dark Blue B( Chemische Fabrik Griesheim-Elektron )