Black (or dark green) powder. The solubility in water (50°C) is 65g/L. The aqueous solution is dark blue-green, add 1mol/L sodium hydroxide solution to turn blue, then add hydrosulfite and warm it to become colorless, and add sodium perborate to still be colorless.
Reactive green 19 can be used for dyeing and printing of cotton fiber.
Reactive green 19 can be obtained by reacting H acid, p-nitroaniline o-sulfonic acid, cyanuric chloride and p-aminobenzenesulfonic acid as raw materials.
