The reactive black WNN in our product portfolio is primarily composed of sodium 4-amino-5-hydroxy-3,6-bis[4-[(2-sulfooxy) ethyl] sulfonyl] phenyl] azo-2,7-naphthalene disulfonate (CAS No. 17095-24-8). It is commonly used for dyeing cotton or viscose fibers. It is suitable for dip dyeing, jig dyeing, roll stacking, and continuous tie-dying. It provides effective dyeing at 60 degrees C and excellent color tone stability for sensitive shades. This dye can achieve deep black shades, and if it is combined with purple or blue, it can create dark blue hues. Offered Reactive Black WNN exhibits a high color fixation rate. Besides, it can also provide nice leveling properties during dyeing.