Potassium iodide (KI) is a chemical compound used in various applications due to its role as a source of iodide ions. It is commonly employed in:

1. Medical Uses: Potassium iodide is used as a medication to prevent thyroid gland damage from radiation exposure in nuclear emergencies. It is also used to treat iodine deficiency and certain thyroid conditions.
2. Chemical Reactions: In laboratories, it serves as a reagent in chemical reactions, including as a reducing agent in iodometric titrations.
3. Photography: Historically, potassium iodide has been used in photographic processes, particularly in the production of certain types of photographic films and papers.
4. Antiseptic Solutions: It is a component in some antiseptic solutions for its antimicrobial properties.

Potassium iodide is valued for its high solubility in water and its ability to form a clear, colorless solution, making it useful in a variety of scientific and industrial application8.