dye|World dye variety

Name:C.I.Direct Brown 146,C.I.25260

Molecular Structure: Double azo class

C.I.Direct Brown 146,C.I.25260,CAS 8003-80-3,582.57,C25H23N10NaO4S,Para Fast Brown GK

Molecular Formula:C₂₅H₂₃N₁₀NaO₄S

Molecular Weight: 582.57

CAS Registry Number:8003-80-3

Manufacturing Methods :  N,N’-bis(3-aminophenyl)urea double nitriding, first and 2,4-Diaminobenzenesulfonic acid coupling, again with Benzene-1,3-diamine coupling.

Properties and Applications: brown. For yellow brown soluble in water, soluble in ethanol olive yellow light brown. The strong sulfuric acid in red orange for brown, diluted yellow brown to orange for brown. The dye solution to join strong hydrochloric acid for brown, have precipitation; Add thick sodium hydroxide solution with olives brown precipitation.

List of Suppliers:

Para Fast Brown GK( Bayer Group )