dye|World dye variety

Name:C.I.Direct Brown 191,C.I.13220

Molecular Structure: Single azo class

C.I.Direct Brown 191,C.I.13220,CAS 10190-16-6,314.31,C12H11N4NaO3S,Padding Brown N

Molecular Formula:C₁₂H₁₁N₄NaO₃S

Molecular Weight: 314.31

CAS Registry Number:10190-16-6

Manufacturing Methods : 4-Aminobenzenesulfonic acid diazo, and Benzene-1,3-diamine coupling.

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

List of Suppliers:

Padding Brown N ( Bayer Group )