dye|World dye variety

Name:C.I.Direct Brown 171,C.I.30040

Molecular Structure: trisazo class

C.I.Direct Brown 171,C.I.30040,794.77,C35H28N10Na2O6S2,Paradiazol Brown RD

Molecular Formula:C₃₅H₂₈N₁₀Na₂O₆S₂

Molecular Weight: 794.77

CAS Registry Number:

Manufacturing Methods :  4-(4-Aminophenyl)benzenamine double nitriding, first and 2,4-Diamino-5-methylbenzenesulfonic acid coupling, and then and 4-Aminonaphthalene-1-sulfonic acid diazo, and Benzene-1,3-diamine coupled to accidentally coupled nitrogen compounds.

Properties and Applications:  red light brown. Slightly soluble in water for orange brown, soluble in ethanol for yellow brown. The strong sulfuric acid for dark red to blue light in brown light purple, for yellow brown after diluted, precipitation. The dye solution to join strong hydrochloric acid have dark red light brown precipitation; Add thick sodium hydroxide solution for orange brown.

List of Suppliers:

Paradiazol Brown RD( Francolor Pigments SA )