dye|World dye variety

Name:C.I.Direct Blue 131,C.I.35085

Molecular Structure: Multi-azo class

C.I.Direct Blue 131,C.I.35085,CAS 6661-39-8,1068.96,C44H31N12Na3O11S3,Diazo Navy Blue 3P

Molecular Formula:C₄₄H₃₁N₁₂Na₃O₁₁S₃

Molecular Weight: 1068.96

CAS Registry Number:6661-39-8

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, first alkaline conditions and formation of accidentally coupled nitrogen compounds, and then in alkaline conditions and 4-Nitrobenzenamine diazo, in acid conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid and the product of three to three, and then will the nitro reduction.

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

List of Suppliers:

Diazo Navy Blue 3P( Chemische Fabrik Griesheim-Elektron )