dye|World dye variety

Name:C.I.Direct Blue 138,C.I.26650

Molecular Structure: Double azo class

C.I.Direct Blue 138,C.I.26650,CAS 6252-59-1,686.02,C27H18ClN5Na2O8S2,Diazo SkyBlue 3GL

Molecular Formula:C₂₇H₁₈ClN₅Na₂O₈S₂

Molecular Weight: 686.02

CAS Registry Number:6252-59-1

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

Properties and Applications: blue. Slightly soluble in water for sauce red to violet black, soluble in ethanol to blue. The strong sulfuric acid for blue-ray green, diluted to blue-ray for blue purple, have precipitation. The dye solution to join strong hydrochloric acid have dark purple precipitation; concentrated sodium hydroxide solution with dark purple precipitate; Add 10% of sulfuric acid and sodium hydroxide solution not change color.

List of Suppliers:

Diazo SkyBlue 3GL( Bayer Group )