C.I. Acid Orange 49

Preparation

4-(4-Amino-2-methylphenyl)-3-methylbenzenamine double nitriding, respectively with the 7-Hydroxynaphthalene-1,3-disulfonic acid and phenol coupling, then use Benzenesulfonyl chloride or 4-Methylbenzene-1-sulfonyl chloride esterification.

Properties and Applications

red light orange. Soluble in water for orange, soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for yellow brown, diluted red orange for. In water solution to join 10% sulfuric acid as red orange; Add 10% sodium hydroxide solution into a dark red light plant color. Used for wool, silk and PVA etc of dyeing and printing fiber directly, also used in leather dyeing.