The molecular formula is ZnS, molecular weight is 97.45, melting point is 1020 ℃(15MPa), white to gray or light yellow powder, density is 4.08g/cm3. Almost insoluble in water, but soluble in acid. Long-term placement in humid air will convert to zinc sulfate. Main uses: can be made into blue light-emitting tubes; powdered zinc sulfide is the most important electroluminescent material, light fluorescent material, used in the preparation of picture tube screen, scoreboard display, light-emitting paint, etc.; widely used in the production of infrared windows, fairing and infrared optical components; zinc sulfide is also used in leather, enamel, rubber, dyes and other industries; used as analytical reagents, phosphors, optical conductor materials. It is also used in the manufacture of dyes, coatings, pigments, glass, cured oil, etc. Used as various filters and laser window coating; Optical coating target material; X-ray fluorescent screen; Add trace radium or new thorium salt for the lumi