Thiosulfates are chemical compounds that contain sulfur and oxygen, typically represented by the formula S2O3^2-. They are often found in various forms, such as sodium thiosulfate, which is commonly used in photography and as a water treatment agent. Thiosulfates play a role in redox reactions and can act as reducing agents. In nature, thiosulfates can be produced by certain bacteria during the sulfur cycle. They are also important in analytical chemistry, where they are used to titrate iodine. Overall, thiosulfates are versatile compounds with applications in both industrial and environmental contexts.