dye|World dye variety

Name:C.I.Direct Brown 148,C.I.25265

Molecular Structure: Double azo class

C.I.Direct Brown 148,C.I.25265,584.54,C25H21N8NaO6S,Para Brown GK

Molecular Formula:C₂₅H₂₁N₈NaO₆S

Molecular Weight: 584.54

CAS Registry Number:

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

Properties and Applications: brown. Slightly soluble in water for yellow brown, slightly soluble in alcohol. The strong sulfuric acid in red orange for brown, diluted yellow brown to orange for brown. The dye solution was added concentrated hydrochloric acid with red brown precipitate; Add thick sodium hydroxide solution for yellow brown to orange brown; Sodium hydroxide solution to dilute the same color.

List of Suppliers:

Para Brown GK( Bayer Group )