Specs: Purity: 75% min (solid)
        Sodium sulphide: 0.1% max
        Sodium sulphite: 1% max
        Sodium carbonate: 0.6% max
        Insoluble substance in water: 0.005% max
        Fe:0.003% max
Properties: 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
Storage: Keep only in closed, properly labeled containers. Do nor store in zinc, aluminum, or copper containers. Store in cool, dry, ventilated area to prevent it from being deliquescent. Separated from acids, acidic materials, oxidizing agents.
Packing: in 25kgs bag.