dye|World dye variety

Name:C.I.Direct Blue 33,C.I.31635

Molecular Structure: trisazo class

C.I.Direct Blue 33,C.I.31635,CAS 8000-88-2,893.77,C36H22N7Na3O11S3,Oxamine Dark Blue BG

Molecular Formula:C₃₆H₂₂N₇Na₃O₁₁S₃

Molecular Weight: 893.77

CAS Registry Number:8000-88-2

Manufacturing Methods : N-(4-aminophenyl)acetamide diazo, coupled with the 4-Hydroxynaphthalene-1-sulfonic acid, and then hydrolysis amino acylation again diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, again diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling. And if 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid mixture coupling is C.I. 31635, if just and 5-Aminonaphthalene-2-sulfonic acidcoupling is C.I.316351, if just and 8-Aminonaphthalene-2-sulfonic acid coupling is C.I. 316352.

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

List of Suppliers:

Oxamine Dark Blue BG( Badische Anilin-und Soda Fabrik )