C.I.25240;Direct Red 141;C.I.Direct Red 141;Diazo Brilliant Scarlet ROL;C.I.Direct Red 141:C.I.25240;Benzamin Brilliant Scarlet ROG;disodium 4-[[4-[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]benzoyl]amino]phenyl]azo]-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylate;4-[[4-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfonaphthalen-2-yl]azo]benzoyl]amino]phenyl]azo]-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylic acid disodium salt;4-[[4-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo]benzoyl]amino]phenyl]azo]-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylic acid sodium salt
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.
