Direct Red 123;Einecs 229-295-6;C.I.Direct Red 123:C.I.17820;sodium 7-[(4-aminobenzoyl)amino]-4-hydroxy-3-[(2-methoxyphenyl)azo]naphthalene-2-sulphonate;2-Naphthalenesulfonic acid, 7-((4-aminobenzoyl)amino)-4-hydroxy-3-((2-methoxyphenyl)azo)-, monosodium salt;2-Naphthalenesulfonic acid, 7-((4-aminobenzoyl)amino)-4-hydroxy-3-(2-(2-methoxyphenyl)diazenyl)-, sodium salt (1:1)
O-Anisidine diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications
red. Soluble in water for red, moderate soluble in alcohol for red orange, and adequate soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for purple, diluted in red. The dye solution to join strong hydrochloric acid for red to blue light red, precipitation; Add thick sodium hydroxide solution have orange brown precipitation.
