Name:C.I.Direct Red 194,C.I.35785
Molecular Structure: Four azo class
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 )