Arsenic sulfide is a chemical compound composed of arsenic and sulfur, with the formula As2S3. It is commonly found in nature as the mineral orpiment, which has a bright yellow color. This compound is known for its use in various applications, including pigments, glassmaking, and as a precursor for other arsenic compounds. In addition to its industrial uses, arsenic sulfide has historical significance in alchemy and traditional medicine. However, it is important to note that arsenic compounds can be toxic, and exposure to arsenic sulfide can pose health risks. Proper safety measures should be taken when handling this substance.