dye|World dye variety

Name:C.I.Direct Red 121,C.I.28250

Molecular Structure: Double azo class

C.I.Direct Red 121,C.I.28250,CAS 5979-32-8,704.64,C30H22N6Na2O8S2,Direct Diazo Bordeaux B,Direct Diazo Bordeaux FB

Molecular Formula:C₃₀H₂₂N₆Na₂O₈S₂

Molecular Weight: 704.64

CAS Registry Number:5979-32-8

Manufacturing Methods : 3-Aminobenzenesulfonic acid diazo, and a coupling m-Toluidine
, its product to diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: red to blue light Claret. For bright red is soluble in water, soluble in ethanol for product red. The strong sulfuric acid in blue, diluted red for brown. The dye solution to join strong hydrochloric acid for red light brown; Add thick sodium hydroxide solution for purplish red color, have precipitation

List of Suppliers:

Direct Diazo Bordeaux B ( Joint Stock Company ‘Coioros’ )

Direct Diazo Bordeaux FB(Colorom SA)