Preparation
Potassium iodide can be prepared through the reaction of potassium hydroxide (KOH) with iodine (I₂).
The chemical reaction is as follows:
Properties
Physical Appearance: White crystalline solid.
Solubility: Soluble in water, with a slightly bitter, saline taste.
Nature: Ionic compound.
Melting Point: 681°C (1258°F).
Stability: Relatively stable but can undergo oxidation in the presence of air and moisture, turning yellow due to the liberation of iodine.
Uses
Nutritional Supplement: Used to prevent iodine deficiency and associated conditions, such as goitre and hypothyroidism.
Medical Use: Acts as a protective agent against radioactive iodine exposure, particularly in the case of nuclear accidents.
Skin Treatment: Used in the treatment of certain skin conditions, such as sporotrichosis and erythema nodosum.
Photographic Industry: Serves as a component of some photographic chemicals and developers.
Storage of Potassium iodide
Conditions: Should be stored in a cool, dry place, away from heat and direct sunlight.
Container: Keep in a tightly closed container to minimize exposure to air and moisture.
Avoid Contact: Store away from strong oxidizing agents and acids to prevent chemical reactions.