Cadmium sulfide

Cadmium sulfide (CdS) is an insoluble yellow compound of cadmium and sulfur. Its semiconducting behavior makes it useful in optoelectronic devices, while its color has made it a pigment.

Cadmium: Cadmium is a soft, bluish-white metallic element with the symbol Cd and atomic number 48. Cadmium supplies the metal ions in CdS and accounts for much of its toxicity.
Cadmium yellow: Cadmium yellow is a family of yellow pigments based primarily on cadmium sulfide. It is the pigment form of CdS used in paints and other colored materials.
Cadmium sulfide synthesis: Cadmium sulfide synthesis is the preparation of CdS by combining cadmium-containing and sulfide-containing reactants. Precipitation from soluble salts is a common route to CdS powders and pigments.
Cadmium toxicity: Cadmium toxicity is harm to organisms caused by exposure to cadmium and its compounds. CdS can release hazardous cadmium under some conditions, especially through ingestion or processing.
Sulfur: Sulfur is a yellow nonmetallic element with the symbol S and atomic number 16. Sulfur combines with cadmium to form the sulfide lattice.
Photoconductivity: Photoconductivity is the increase in a material's electrical conductivity when it absorbs light. Light-generated carriers make CdS useful as a photosensitive material.
Cadmium yellow in art: Cadmium yellow in art is the use of cadmium sulfide pigments in paintings and other artworks. Artists adopted the pigment for its vivid yellow color and strong covering power.
Cadmium poisoning: Cadmium poisoning is illness caused by significant exposure to cadmium through inhalation, ingestion, or other routes. Dust or fumes from cadmium-containing materials can create occupational exposure risks.
Sphalerite: Sphalerite is the mineral form of zinc sulfide, commonly containing iron and other trace elements. Its zinc sulfide structure is closely related to the common crystal structure of CdS.
Cadmium sulfide cell: A cadmium sulfide cell is a light-dependent resistor whose CdS layer changes resistance with illumination. This device uses CdS photoconductivity to sense light.

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