Name:C.I.Direct Brown 158,C.I.30070
Molecular Structure: trisazo class
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.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Metadiazol Brown JO( Francolor Pigments SA )