Arsenic trisulfide is a chemical compound with the formula As2S3. It appears as a yellow or orange solid and is primarily used in the production of glass and pigments. This compound is also known as orpiment and has been historically used in art and cosmetics. In nature, arsenic trisulfide can be found in certain mineral deposits. It is important to handle this substance with care, as it contains arsenic, which is toxic. Proper safety measures should be taken when working with or around arsenic trisulfide to avoid health risks associated with arsenic exposure.