Name:C.I.Direct Brown 20,C.I.30060
Molecular Structure: trisazo class
Molecular Weight: 746.66
CAS Registry Number:
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid diazo, and Benzene-1,3-diamine coupled to a product matches.
Properties and Applications: brown. Soluble in water for red light brown. The strong sulfuric acid for red light blue, for yellow brown after diluted. The dye solution to join strong hydrochloric acid have dark brown precipitation; With strong sodium hydroxide solution for yellow brown, then a red light brown precipitation.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Diazol Brown FBR( Francolor Pigments SA )