FANDOM


Photo-MA-EVMZNS40312T

Zinc sulfide (or zinc sulphide) is a chemical with the chemical formula ZnS. Zinc sulfide fluoresces green, and is employed most often for its phosphorescent properties.

PropertiesEdit

ChemicalEdit

Zinc sulfide can be roasted to release sulfur dioxide, leaving zinc oxide behind.

2 ZnS + 3 O2 → 2 ZnO + 2 SO2

PhysicalEdit

Zinc sulfide is a white-yellowish solid, and it is widely used as a pigment. In its dense synthetic form, zinc sulfide can be transparent, and it is used as a window for visible optics and infrared optics. ZnS has a density of 4.090 g/cm3. It is poorly soluble in water but more soluble in acids. ZnS boils at 1,185 °C.

AvailabilityEdit

Zinc sulfide can be purchased from various science shops, as glowing powder.

Higher purity ZnS can be purchased from various chemical suppliers.

PreparationEdit

Zinc sulfide is often produced by reacting zinc oxide with hydrogen sulfide, which produces zinc sulfide and water. Another method for producing the chemical is by heating a solution of zinc sulfate with sodium thiosulfate. Another way is to make a equimolar mix of zinc and sulfur powders and ignite the mix. This produces a bright green flame and impure ZnS. The impure ZnS can be purified through decantation.

UsesEdit

Zinc sulfide can be used to produce hydrogen sulfide in a lab by the reaction with hydrochloric acid. The reaction proceeds as such:

ZnS + 2HCl → ZnCl2 + H2S

ProjectsEdit

  • Make glowing powder
  • Hydrogen sulfide production
  • Sulfur dioxide generation

HandlingEdit

SafetyEdit

Zinc sulfide dust is irritant to the eyes, skin, if inhaled or ingested. In case of ingestion, it will release toxic hydrogen sulfide.

StorageEdit

Zinc sulfide does not require special storage, although it should be kept away from any strong acid vapors, as it will release hydrogen sulfide gas on contact.

DisposalEdit

Zinc sulfide doesn't require special disposal, though it can be neutralized with hydrogen peroxide.

ReferencesEdit

Relevant Sciencemadness threadsEdit

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.