dye|World dye variety

Name:C.I.Direct Blue 120:1,C.I.34090

Molecular Structure: trisazo class

C.I.Direct Blue 120:1,C.I.34090,CAS 3626-30-0,877.77,C36H22N7Na3O10S3,Diazo Blue BR,Direct Blue LMN

Molecular Formula:C₃₆H₂₂N₇Na₃O₁₀S₃

Molecular Weight: 877.77

CAS Registry Number:3626-30-0

Manufacturing Methods : 2-(4-Aminophenylamino)-2-oxoacetic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, again diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, product to diazo, and 6-Hydroxynaphthalene-2-sulfonic acid coupling, and then 2-(4-Aminophenylamino)-2-oxoacetic acid hydrolysis base.

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

List of Suppliers:

Diazo Blue BR (Yorkshire Group pic)

Diazo Direct Blue LMN( Sintofarm SA )