Name:C.I.Direct Red 156,C.I.25215
Molecular Structure: Double azo class
Molecular Weight: 789.68
CAS Registry Number:7198-98-3
Manufacturing Methods : 4-Nitrobenzenamine diazo, first with 2-Hydroxybenzoic acid coupling, and then will The nitro reduction, and nitrobenzene formex condensation of chlorine, then The nitro reduction nitride pay equal attention to, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: colourful red yellow light. Soluble in water is palm red light to orange, soluble in alcohol. The strong sulfuric acid for blue-ray in red, orange brown for colourful after diluted. Dye with strong hydrochloric acid solution for purplish red color, have precipitation; With strong sodium hydroxide solution for palm light orange, the red light.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Diazo Brilliant Scarlet 3G( IG Farbenindustrie AG )