dye|World dye variety

Name:C.I.Direct Brown 158,C.I.30070

Molecular Structure: trisazo class

C.I.Direct Brown 158,C.I.30070,CAS 6449-84-9,694.63,C32H24N8Na2O6S,Metadiazol Brown JO

Molecular Formula:C₃₂H₂₄N₈Na₂O₆S

Molecular Weight: 694.63

CAS Registry Number:6449-84-9

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first with 2-Hydroxy-3-methylbenzoic acid coupling, and then and 4-Aminobenzenesulfonic acid diazo, and Benzene-1,3-diamine coupled to accidentally coupled nitrogen compounds.

Properties and Applications: brown. Soluble in water for orange brown. The strong sulfuric acid to red light purple, for orange after diluted. The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for red light brown, and with orange brown will sink.

List of Suppliers:

Metadiazol Brown JO( Francolor Pigments SA )