dye|World dye variety

Name:C.I.Direct Brown 166,C.I.31515

Molecular Structure: trisazo class

C.I.Direct Brown 166,C.I.31515,CAS 8005-89-8,982.73,C32H23N10Na5O14S3,Para Brown RK

Molecular Formula:C₃₂H₂₃N₁₀Na₅O₁₄S₃

Molecular Weight: 982.73

CAS Registry Number:8005-89-8

Manufacturing Methods : N-(3-aminophenyl)formamide diazo, first in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, hydrolysis amino acylation, product to double nitriding, and 0.8 Moore 2-(3-Aminophenylamino)acetic acid and 0.2 Moore 2,4-Diaminobenzenesulfonic acid (2 Moore) coupled.

Properties and Applications:  brown to red light brown. The strong sulfuric acid for dark purple red to date, diluted red for brown. The dye solution to join strong hydrochloric acid with chocolate brown precipitation; Add thick sodium hydroxide solution for purplish red color

List of Suppliers:

Para Brown RK( Bayer Group )