dye|World dye variety

Name:C.I.Direct Brown 69,C.I.30365

Molecular Structure: trisazo class

C.I.Direct Brown 69,C.I.30365,883.78,C34H24N9Na3O10S3,Dianil Brown R

Molecular Formula:C₃₄H₂₄N₉Na₃O₁₀S₃

Molecular Weight: 883.78

CAS Registry Number:

Manufacturing Methods :  2-Amino-5-(4-aminophenyl)benzenesulfonic acid double nitriding, first and 4-Aminobenzenesulfonic acid diazo, and Benzene-1,3-diamine coupled to a product matches, then in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid  coupling.

Properties and Applications: red light brown. Soluble in water for red orange brown. The strong sulfuric acid in grey or black for purple, for brown after diluted. The dye solution to join strong hydrochloric acid for brown, have precipitation; Add thick sodium hydroxide solution for orange brown.

List of Suppliers:

Dianil Brown R( Farbwerke vorm. Meister Lucius &Brtining )