18 Facts About Deionized water

Purified Deionized water is Deionized water that has been mechanically filtered or processed to remove impurities and make it suitable for use.

Purified Deionized water has many uses, largely in the production of medications, in science and engineering laboratories and industries, and is produced in a range of purities.

The Deionized water is "softened" by exchanging poorly soluble divalent cations with the soluble cation.

However, demineralized water is often used interchangeably with deionized water and can be confused with softened water, depending on the exact definition used: removing only the cations susceptible to precipitate as insoluble minerals, or removing all the "mineral species" present in water, and thus not only dissolved ions but neutral solute species.

So, the term demineralized water is vague and deionized water or softened water should often be preferred in its place for more clarity.

Purified Deionized water is suitable for many applications, including autoclaves, hand-pieces, laboratory testing, laser cutting, and automotive use.

The microbiological content of the Deionized water is of importance and the Deionized water must be regularly monitored and tested to show that it remains within microbiological control.

Purified Deionized water is used in the commercial beverage industry as the primary ingredient of any given trademarked bottling formula, in order to maintain critical consistency of taste, clarity, and color.

For example, Deionized water that is being used for molecular-biology experiments needs to be DNase or RNase-free, which requires special additional treatment or functional testing.

Deionized water should be re-mineralized before use in aquaria since it lacks many macro- and micro-nutrients needed by plants and fish.

Deionized water is very often used as an ingredient in many cosmetics and pharmaceuticals.

The lack of impurity in the Deionized water means that the system stays clean and prevents a buildup of bacteria and algae.

However, deionized water has been known to cause cracks in brass and copper fittings.

Deionized water is used in water-fog fire-extinguishing systems used in sensitive environments, such as where high-voltage electrical and sensitive electronic equipment is used.

The extremely fine mist produced takes the heat out of fire rapidly, and the fine droplets of water are nonconducting and are less likely to damage sensitive equipment.

Deionized water is inherently acidic, and contaminants rapidly supply ions, thus re-ionizing the water.

Window cleaners using Deionized water-fed pole systems use purified Deionized water because it enables the windows to dry by themselves leaving no stains or smears.

The use of purified Deionized water from Deionized water-fed poles prevents the need for using ladders and therefore ensure compliance with Work at Height Legislation in the UK.