About Zinc sulfide


Yellowish-white powder. ZnS exists in two crystalline forms, α (wurtzite) and β (sphalerite). Stable if kept dry. α: d 3.98. β: d 4.102, changes to α form at 1020C. Sublimes at 1180C. Soluble in acids; insoluble in water. Pigment for paints, oilcloths, linoleum, leather, dental rubber, etc., especially in the form of lithopone, mixed with ZnO as "mineral white." Anhydrous zinc sulfide is used in X-ray screens and with a trace of radium or mesothorium salt in luminous dials of watches, also television screens. Zinc sulfide is mined from natural deposits and concentrated by various processes. Also, zinc sulfide may be prepared in the laboratory by passing hydrogen sulfide through an aqueous solution of a soluble zinc salt, such as zinc chloride or zinc nitrate. The precipitate is filtered, washed, and dried. Production is similar to that of lithopone. A Na2S solution is mixed with a zinc salt solution under precisely controlled conditions. The resulting zinc sulfide precipitate is calcined and processed to give the finished product. Na2S + ZnSO4 ZnS + Na2SO4. Inhalation of the material may be harmful. Contact may cause burns to the skin and eyes. Inhalation of Asbestos dust may have a damaging effect on the lungs. Fire may produce irritating, corrosive and toxic gases. Some liquids produce vapours that may cause dizziness or suffocation. Runoff from fire control may cause pollution. Some may burn, but none ignite readily. Containers may explode when heated. Some may be transported hot. If you are looking for high quality, high purity and cost-effective zinc sulfide, or if you require the latest price of zinc sulfide, please feel free to emaill contact mis-asia.

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