Selenium disulfide
![Structure of 1,2,3-Se3S5](/Images/godic/202502/10/1,2,3-Se3S5.svg4002.png")
Selenium disulfide is an inorganic compound with the approximate formula SeS2. Both sulfur and selenium catenate form chains and rings readily, and mixtures of selenium and sulfur likewise give rise to numerous "alloys". This compound is not an analogue of sulfur dioxide.