Potassium Iodide Shelf Life: What You Need To Know In 2023

Potassium IodideIodine Reagent Chemistry


Potassium iodide (KI) is a chemical compound that is commonly used to treat and prevent radiation exposure. It works by protecting the thyroid gland from absorbing radioactive iodine, which can cause thyroid cancer. However, like any medication, KI has a shelf life, and it is important to understand how to store and use it properly to ensure its effectiveness.

What is the Shelf Life of Potassium Iodide?

The shelf life of potassium iodide depends on several factors, including the form of the medication and the storage conditions. Generally, KI tablets have a shelf life of 5-7 years, while liquid KI has a shorter shelf life of 2-3 years. However, these are just estimates, and the actual shelf life may vary depending on the manufacturer and other factors.

Factors That Affect KI Shelf Life

There are several factors that can affect the shelf life of potassium iodide. These include:

  • Exposure to light
  • Exposure to heat or cold
  • Humidity
  • Contamination

How to Store Potassium Iodide

To ensure the effectiveness of KI, it is important to store it properly. Here are some tips:

  • Store KI in a cool, dry place away from direct sunlight.
  • Avoid exposing KI to extreme temperatures, such as freezing or high heat.
  • Keep KI in its original packaging until you are ready to use it.
  • Do not store KI near chemicals or other substances that may contaminate it.

How to Tell if KI is Expired

If you are unsure whether your KI is still effective, there are a few things you can look for:

  • Check the expiration date on the packaging. If it has passed, the KI may not be effective.
  • Check the color and odor of the KI. If it looks or smells different than when you first got it, it may be expired.
  • Consult with a healthcare professional if you are unsure whether your KI is still effective.


Potassium iodide is an important medication for protecting against radiation exposure. However, it is important to understand its shelf life and how to store it properly to ensure its effectiveness. By following the tips outlined in this article, you can ensure that your KI is ready to use when you need it most.