Name:C.I.Direct Brown 59,C.I.22345
Molecular Structure: Double azo class
Molecular Weight: 703.63
CAS Registry Number:3476-50-2
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then in alkaline conditions and 4-Hydroxy-6-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications: black light brown. Soluble in water for olive brown, soluble in ethanol for red brown, slightly soluble in acetone. The strong sulfuric acid for purple, diluted Shallow red brown for; In nitric acid in by the red light brown into olive brown. The dye solution to join strong hydrochloric acid have dark brown precipitation; Add thick sodium hydroxide solution have red light brown precipitation.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Atul Direct Brown BN ( Atul Limited )
Direct Dark Brown B( Multicrom SA )
Direct Fast Brown B (Classic Dyestuffs Inc)