Used in the production of infrared-transmitting glass, essential for night vision devices and thermal imaging systems. Acts as a pigment in paints and dyes, providing a vibrant yellow color. Employed in pyrotechnics to create specific visual effects in fireworks. Utilized in the semiconductor industry for the fabrication of certain types of electronic components. Plays a role in traditional medicine and alchemy, though its use is now limited due to toxicity concerns. Also applied in the manufacturing of certain types of glass and ceramics for specialized purposes.