dye|World dye variety

Name:C.I.Direct Brown 59,C.I.22345

Molecular Structure: Double azo class

C.I.Direct Brown 59,C.I.22345,CAS 3476-50-2,703.63,C35H23N5Na2O7S,Direct Fast Brown B,Direct Brown BN,Direct Dark Brown B

Molecular Formula:C₃₅H₂₃N₅Na₂O₇S

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.

List of Suppliers:

Atul Direct Brown BN ( Atul Limited )

Direct Dark Brown B( Multicrom SA )

Direct Fast Brown B (Classic Dyestuffs Inc)