dye|World dye variety

Name:C.I.Direct Red 50,C.I.31525

Molecular Structure: trisazo class

C.I.Direct Red 50,C.I.31525,CAS 13194-98-4,622.54,C28H19N6NaO8S,Fast Bordeaux,Direct Scarlet 2H

Molecular Formula:C₂₈H₁₉N₆NaO₈S

Molecular Weight: 622.54

CAS Registry Number:13194-98-4

Manufacturing Methods : 3′-Aminooxanilic acid diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, and then hydrolysis, the grass, then double nitriding, and Resorcinol (2 Moore) coupled.

Properties and Applications: red. Soluble in water for red orange brown, soluble in ethanol. The strong sulfuric acid for violet black, to orange diluted. The dye solution to join strong hydrochloric acid for red orange brown; Add thick sodium hydroxide solution for purplish red color.

List of Suppliers:
Diamine Fast Bordeaux ( Carbotex Consultants )

Direct Scarlet 2H (Classic Dyestuffs Inc)