dye|World dye variety

Name:C.I.Direct Red 141,C.I.25240

Molecular Structure: Double azo class

C.I.Direct Red 141,C.I.25240,CAS 6391-23-7,855.74,C40H27N9Na2O9S,Diazo Brilliant Scarlet ROL

Molecular Formula:C₄₀H₂₇N₉Na₂O₉S

Molecular Weight: 855.74

CAS Registry Number:6391-23-7

Manufacturing Methods : N-(4-aminophenyl)-4-nitrobenzamide diazo, and 5-Oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid coupling, its product nitro reduction for amino, again diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications:  red. Soluble in water for red orange brown, slightly soluble in ethanol is palm light orange. The strong sulfuric acid in bright red, diluted for orange, red orange precipitation. The dye solution with strong hydrochloric acid for red, have precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation.

List of Suppliers:

Diazo Brilliant Scarlet ROL( IG Farbenindustrie AG )