Cadmium sulfide, or CdS, is a chemical compound made up of cadmium and sulfur. It appears as a bright yellow solid and is commonly used in various applications, including pigments, solar cells, and as a semiconductor material. CdS is known for its ability to absorb light, making it useful in photovoltaic devices. In addition to its industrial uses, CdS is also studied for its potential in nanotechnology and optoelectronics. However, due to the toxicity of cadmium, safety precautions are necessary when handling this compound. Proper disposal and management are essential to minimize environmental impact.