dye|World dye variety

Name:C.I.Direct Brown 99,C.I.34020

Molecular Structure: trisazo class

C.I.Direct Brown 99,C.I.34020,CAS 6661-42-3,813.73,C34H25N9Na2O9S2,Sirius Brown RV

Molecular Formula:C₃₄H₂₅N₉Na₂O₉S₂

Molecular Weight: 813.73

CAS Registry Number:6661-42-3

Manufacturing Methods :  3-Aminonaphthalene-1,5-disulfonic acid diazo, and Naphthalen-1-amine coupling, product to diazo, and 2-Amino-4-methylanisole coupling, generation of accidentally nitrogen compounds to diazo, and 4-Nitrobenzene-1,3-diamine coupling.

Properties and Applications: red light brown. Moderate soluble in water and ethanol for brown. The strong sulfuric acid for blue-ray green (+ violet black), diluted for Shallow red time The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for yellow brown, with brown precipitation.

List of Suppliers:

Sirius Brown RV( Bayer Group )