Name:C.I.Direct Brown 61,C.I.30055
Molecular Structure: trisazo class
Molecular Weight: 730.66
CAS Registry Number:
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, then with 4-Hydroxynaphthalene-1-sulfonic acid diazo, and Benzene-1,3-diamine coupled to a single accidentally coupled nitrogen compounds.
Properties and Applications: red light brown. Soluble in water for dark orange brown. The strong sulfuric acid for purple, dilute after brown precipitation. The dye solution to join strong hydrochloric acid have dark brown precipitation; Add thick with a small amount of sodium hydroxide solution red precipitate.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
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