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  • Deionized Water (DI)
  • For Laboratory Work
  • 1 Gallon
  • 5 Gallon
  • 55 Gallon Drum
  • LC/MS Grade Water 4 Liter
  • Grades For Sale Online: Distilled, Filtered, Reverse Osmosis, Ultrapure, UHPLC, HPLC, ACS-ASTM, LC/MS, USP Pharmaceutical, Ultrapure, Molecular Biology
  • For Chromatography
  • Ingredient Material For Purification, Drug Product Manufacturing, Cleaners, Botanical Extracts, Cell Culture & Medical Device Processing And Analytical Testing Is Where To Buy Deionized Water In Bulk | Highly Pure Laboratory Grade Deionized Water For Sale Online | ASTM Type II | Delivered By UPS And LTL | Note That Deionized Water Is Not The Same As Distilled Water | Deionized Water Is Purer Than Distilled Water And Is More Expensive

Buy Deionized Water Online Here Or By Phone: 512-668-9918

If you have questions about ordering deionized water in bulk online here at or would like to place an order, call 512-668-9918 or email to talk with a Deionized Water Specialist. Lab Alley is a wholesale supplier and distributor of deionized water based in Austin, Texas.

Buy Deionized Water Online For Delivery In The United States

If you need to use highly pure deionized water instead of distilled water or tap water, order it online at Although deionized water and distilled water are both very pure, they not interchangeable due to the purification methods used. Both types of water are used for laboratory, automotive, pharmaceutical and medical applications.

You can use deionized water purchased online at for your CPAP (Continuous Positive Airway Pressure) machine, battery or radiator. Our deionized water is much purer than tap water.

Deionized water is clean and safe to drink although it does not contain essential nutrients and minerals frequently found in traditional sources of water. Deionized or DI water is water that has had all of the ions removed. These ions are typically mineral salts, including iron, calcium, and sulfate. 

You can use deionized water to wash your car and fill your fish tank or aquarium. It is safe for your skin, body and hair. Laboratories frequently order deionized water at because it is pure and does not negatively affect test results. Because deionized water has a low conductivity is is often used in industrial applications that require low temperatures in manufacturing processes. Although some people use deionized water for their plants, it is not necessary. 

Uses Of Deionized Water

  • Deionized Water For CPAP Machines
  • Deionized Water Is Used In Cosmetics
  • Deionized Water For Topping Off Batteries
  • Deionized Water For Window Cleaning 
  • Deionized Water For Ironing
  • Deionized Water For Car Wash
  • Deionized Water For Detailing Cars
  • Deionized Water for pH Calibration
  • Deionized Water For Plants
  • Deionized Water Is Used In Labs
  • Deionized Water Is Used To Cool And Lubricate Machines
  • Deionized Water Is Used In Processed Foods
  • Deionized Water Is Used To Formulate Medicines
  • Deionized Water For Hair
  • Deionized Water For Engine Coolant
  • Deionized Water For Fish Tanks
  • Deionized Water For Aquariums

What Is Deionized Water Used For? [Understanding the Benefits and Risks of Deionized (DI) Water]

Deionized water may be used to cool, lubricate machines as well as other applications in an industrial setting. Deionized water can be used to manufacture cosmetics, medicines and also process foods.

What Is The pH Of Deionized Water? [7]

In theory, the lack of ions means that deionized water should have a pH of 7. However, when deionized water comes into contact with atmospheric carbon dioxide, its absorption of the gas produces carbonic acid, which can reduce the water's pH to as little as 5.5.

Deionized Water For Batteries

The electrolyte in a flooded deep cycle battery is a solution of acid and water. Using distilled or deionized water is recommend because it is free from additional minerals you would find in water such as regular tap water. Adding chemicals and minerals can significantly decrease the life of batteries.

Deionized Water For Hair [Deionized Water And It's Effects On Locs - Dr Locs]

Dionized Water And It's Effects On Locs. Deionized water is water where the ions have been removed through electrically charged resins. ... As you may have guessed, deionized water is also known as pure water, which is safe and beneficial for the hair, skin and body.

Deionized Water For Coolant [Deionized Water vs. Distilled Water For Coolant Flush]

Certainly more than good enough for engine coolant use. Deionized water can contain uncharged non-water molecules, while distilled water should just be H2O (and some HO- and H3O+). In other words, distilled water is a superior subset of deionized water--not the other way around.

Deionized Water For Window

Cleaning Deionized water is also called demineralized water, DM water, DI water, or DIW. Trace amounts of minerals like sodium & calcium are in tap water. ... A brush is used to agitate the dirt from the glass and then it is rinsed completely with the deionized water. When it the glass dries, it is completely spot and streak free.

Deionized Water For Ironing [Can I Use Deionised Water in my Steam Iron?]

With no minerals, deionised water is very unlikely to cause any mineral build-up. In fact, this is why it is used to clean laboratory instruments, mechanical parts and even electric circuit boards. But this is not the reason why it isn't recommended for steam irons.

Deionized Water For Aquariums [9 Different Aquarium Water Sources] 

Deionization units remove both minerals and even man-made chemicals such as pesticides from the water. The downside with DI systems is that they cannot remove bacteria or sediments from your water. ... Just like reverse osmosis, deionized water needs to be remineralized before being used inside your tank.

Deionized Water For Cleaning [Why Use Deionized Water For Cleaning?]

When water is deionized, it draws in other minerals and elements, such as those found in dirt and contaminants. ... Using deionized water to clean with is a relatively new method. It uses no chemicals, as they are replaced by the water. When it comes to cleaning, deionized water is much more efficient than tap water.

How Do You Wash Your Car With Distilled Water? [Cleaning Your Car With Distilled Water - Dr. Beasley's]

They stick with distilled because it's overall much better for the health of the car's paint. If your tap water is soft, it's fine to use it to wash your car. You just want to (as always) make sure you dry every inch of your vehicle after washing. If you've got hard tap water, avoid using it to clean your car.

Deionized Water For pH Calibration [pH Meter Calibration And Electrode Maintenance Guide] 

After cleaning, rinse the pH electrode thoroughly with distilled or deionized (DI) water, and then soak the electrode in storage solution for at least 2-3 hours before calibration. We recommend soaking the electrode overnight for best results.

Deionized Water For Plants [Is Pure Water Good For Plants? – Water Is the New Gold] 

A couple of crazy things can happen if you water your plants with distilled or deionized water. ... If the plant is over-watered, the pure water will take a lot of the nutrients from the soil and drip away, or seep into soil away from your plants. In this case using pure water can deplete your plants of nutrients.

Information On Deionized Water From Wikipedia

Deionized water (DI water, DIW or de-ionized water), often synonymous with demineralized water / DM water, is water that has had almost all of its mineral ions removed, such as cations like sodium, calcium, iron, and copper, and anions such as chloride and sulfate. Deionization is a chemical process that uses specially manufactured ion-exchange resins, which exchange hydrogen and hydroxide ions for dissolved minerals, and then recombine to form water. Because most non-particulate water impurities are dissolved salts, deionization produces highly pure water that is generally similar to distilled water, with the advantage that the process is quicker and does not build up scale. However, deionization does not significantly remove uncharged organic molecules, viruses or bacteria, except by incidental trapping in the resin. Specially made strong base anion resins can remove Gram-negative bacteria. Deionization can be done continuously and inexpensively using electrodeionization. Three types of deionization exist: co-current, counter-current, and mixed bed.

Distilled Versus Deionized Water | Chemistry Minute [YouTube Video]

The Difference Between Distilled and Deionized Water
These two forms of purified water are similar but not interchangeable
By Anne Marie Helmenstine, Ph.D.
Updated October 05, 2019

While you can drink tap water, it's not suitable for most laboratory tests, preparing solutions, calibrating equipment, or cleaning glassware. For the lab, you want purified water. Common purification methods include reverse osmosis (RO), distillation, and deionization.

Distillation and deionization are similar in that both processes remove ionic impurities, however, distilled water and deionized water (DI) are not the same nor are they interchangeable for many lab purposes. Let's take a look at how distillation and deionization work, the difference between them, when you should use each type of water, and when it's okay to substitute one for the other.

How Distilled Water Works

Distilled water is a type of demineralized water that is purified using the process of distillation to remove salts and particulates. Usually, the source water is boiled and the steam is collected and condensed to yield distilled water.

The source water for distillation can be tap water, but spring water is most commonly used. Most minerals and certain other impurities are left behind when water is distilled, but the purity of the source water is important because some impurities (e.g., volatile organics, mercury) vaporize along with the water.

How Deionized Water Works 

Deionized water is made by running tap water, spring water, or distilled water through an electrically charged resin. Usually, a mixed ion exchange bed with both positive and negative charged resins is used. Cations and anions in the water exchange with H+ and OH- in the resins, producing H2O (water).

Because deionized water is reactive, its properties start to change as soon as it's exposed to air. Deionized water has a pH of 7 when it is delivered, but as soon as it comes into contact with carbon dioxide from the air, the dissolved CO2 reacts to produce H+ and HCO3-, driving the pH closer to 5.6.

Deionization does not remove molecular species (e.g., sugar) or uncharged organic particles (most bacteria, viruses).

Distilled vs. Deionized Water in the Lab 

Assuming the source water was tap or spring water, distilled water is pure enough for nearly all lab applications. It is used for:

  • a solvent to prepare a solution
  • analytical blank
  • calibration standard
  • cleaning glassware
  • equipment sterilization
  • making high purity water

The purity of deionized water depends on the source water. Deionized water is used when a soft solvent is needed. It is used for: 

  • cooling applications where it's important to avoid depositing minerals
  • microbiology autoclaves
  • many chemistry experiments involving ionic compounds
  • washing glassware, especially the final rinse
  • solvent preparation
  • analytical blanks
  • calibration standards
  • in batteries

As you can see, in some situations either distilled or deionized water is fine to use. Because it is corrosive, deionized water is not used in situations involving long-term contact with metals.

Substituting Distilled and Deionized Water

You don't generally want to substitute one type of water for the other, but if you have deionized water made from distilled water that has been sitting out exposed to air, it becomes ordinary distilled water. It's fine to use this type of leftover deionized water in place of distilled water. Unless you're certain it won't affect the outcome, do not substitute one type of water for another for any application that specifies which type to use.

Drinking Distilled and Deionized Water

Although some people like to drink distilled water, it's really not the best choice for potable water because it lacks minerals found in spring and tap water that improve the flavor of water and confer health benefits.​

While it's okay to drink distilled water, you should not drink deionized water. In addition to not supplying minerals, deionized water is corrosive and can cause damage to tooth enamel and soft tissues. Also, deionization does not remove pathogens, so DI water may not protect against infectious diseases. However, you can drink distilled, deionized water after the water has been exposed to air for a while.

Product Summary

33 oz Bottle | 1 Gallon | Bulk Prices | 5 Gallon | 55 Gallon Drum | Type II Lab Grade For Sale Online | Delivered UPS | DI Water & Demineralized Water For Sale Online | For CPAP Machines, Topping Up Batteries, Cleaning, Car Wash, Plants, Hair, Engine Coolant, Fish Tanks & Aquariums | pH 7