What is Deionized Water?

Deionized water is a type of drink which removed all of its ions, and it has no charge. It can be created by taking conventional water and letting it exposed to electrically charged resins that will bind and attract to salts, and remove them from the water.


Deionized water is a true pure water. This has critical implications, especially for the medical industry. When medical product manufacturers create a product, water is almost always mixed in. However, to create a chemically sound product, the water can’t contain any impurities that could potentially change the product’s chemical composition.

DI water is also used in various other industries for many reasons. For example where surgical instruments are cleaned, deionized water is used in conjunction with a liquid or gas disinfectant and a microbial-free rinse to ensure that the instruments are free of any residuals, thereby ensuring absolute sterility. This is something that other forms of water are unable to achieve.


These terms may be used interchangeably, but they are actually two different types of water.

  • For household use, there is no difference. Deionized water can be used for anything that traditionally required the use of distilled water, but it is typically used in an industrial or medical setting and not intended as drinking water.

  • While deionization removes most of the minerals and other inorganic ions, it does not affect organic substances or microbes. Distillation generally produces water of better purity, but might not remove volatile organic compounds. Distilled water is safe to drink.

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