Sodium Hydrosulfide is yellow or yellowish flake solid, soluble in water, soluble in ethanol, ether, etc Dyestuff industry is used to synthesize organic intermediates and auxiliaries for preparing sulfur dyes. Mining industry is widely used in copper ore dressing. Colorless needle-like crystal,easy to be deliquesced,it will decomposed and release hydrogen disulfide at its melting point,soluble in water and alcohols, its water solution is strongly alkaline, it will generate hydrogen disulfide when reacting with acids. The industrial good is solution, orange or yellow, bitter taste.