dye|World dye variety

Name:C.I.Direct Red 194,C.I.35785

Molecular Structure: Four azo class

C.I.Direct Red 194,C.I.35785,CAS 6471-41-6,1334.82,C47H28Cl4N10Na4O15S4,Solex Bordeaux

Molecular Formula:C₄₇H₂₈Cl₄N₁₀Na₄O₁₅S₄

Molecular Weight: 1334.82

CAS Registry Number:6471-41-6

Manufacturing Methods : 2-Amino-3,5-dichlorobenzenesulfonic acid diazo, and m-Toluidine coupling, and then a sulfonic acid hydrolysis off base, its product (2 Moore) diazo, coupled with N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)urea.

Properties and Applications:  yellow light red. Soluble in water for blue-ray red, slightly soluble in alcohol. The strong sulfuric acid for blue, purple red after diluted. The dye solution to join strong hydrochloric acid for dark purple, have precipitation; Add thick sodium hydroxide solution for purplish red color, have precipitation.

List of Suppliers:

Solex Bordeaux ( Colcotronis Brothers )