Name:C.I.Direct Brown 26,C.I.31730
Molecular Structure: trisazo class
Molecular Weight: 867.75
CAS Registry Number:8003-55-2
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 5-Aminonaphthalene-1-sulfonic acid coupling.
Properties and Applications: dark red light brown. Soluble in water for olive brown, and adequate soluble in alcohol is palm yellow light. The strong sulfuric acid for dark purple, diluted dark green to shallow blue to olive brown precipitation. The dye solution to join strong hydrochloric acid have brown light olive precipitation; Add thick sodium hydroxide solution have orange brown precipitation.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Direct Daric Brown G( Frado )