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Direct Brown 158

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

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.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain

List of Suppliers:

Metadiazol Brown JO( Francolor Pigments SA )


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