Name:C.I.Direct Brown 27,C.I.31725
Molecular Structure: trisazo class
Molecular Weight: 867.75
CAS Registry Number:6360-29-8
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and with 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling.
Properties and Applications: dark red light brown. Soluble in water for brown, soluble in ethanol is shallow red sauce. The strong sulfuric acid for blue to blue-black, diluted with light olive green precipitation. The dye solution to join strong hydrochloric acid have olive green precipitation; Add thick sodium hydroxide solution have orange brown precipitation.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Direct Chrome Brown A ( Colorom SA )
Vopsider Brown DMG ( Colorom SA )