What is the Melting Point of Potassium Iodide?

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A Chemical Compound

Potassium iodide, commonly known as KI, is an inorganic compound that serves many purposes. It is a scavenger of hydroxyl radicals, an expectorant, and can be used to treat breathing conditions.

The melting point of potassium iodide is at around 300 degrees centigrade. This temperature is caused by the exothermic reaction of potassium hydroxide with elemental iodine in water. The exothermic reaction will generate a lot of heat and it can take some time before the entire iodine is consumed.

Reagent offers KI in a variety of strengths and pack sizes. The most common strength is 2%.


KI is often used as a dietary supplement and can even be found in table salt. It is also commonly used as a thyroid protectant.

It is also an anti-radiation agent and can be helpful to those who have had radiation poisoning. It blocks radioactive iodine from being absorbed by the thyroid gland, which can prevent the growth of cancerous iodine-131.

Safety and Side Effects

KI can cause a range of adverse reactions in people with iodine sensitivity, including Jod-Basedow phenomenon, hypothyroidism, and hyperthyroidism. It can also lead to sialadenitis, rashes, and other gastrointestinal disturbances.

It is also a possible trigger for autoimmune thyroid diseases and should be avoided in patients with thyrotoxicosis, hypocomplementemic vasculitis, or dermatitis herpetiformis. It is also a potential allergen and should be avoided by those with allergic reactions to iodine. Additionally, it can be a poison and should be handled with care.

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