Buy deionized water in bulk from a chemical distributor that ships sealed, lot-controlled containers with a COA. The main U.S. options are: 1) RightPath Industries, 2) on-site DI exchange-tank services, 3) laboratory-supply catalogs for small reagent bottles, and 4) retail gallon jugs. RightPath Industries supplies deionized water (CAS 7732-18-5) in gallons, pails, drums, totes and bulk, with same-day quotes.
Deionized (DI) water is water with its dissolved mineral ions removed by ion exchange. Plants buy it for final rinsing, reagent and solution preparation, battery and cooling-system make-up, and dilution of concentrates. This guide covers who to buy from, which grade to write on the purchase order, how much each container weighs, how it ships and what changes the price.
Which suppliers should be on your bulk deionized water shortlist?
The right channel depends on volume, purity and whether you want to run equipment yourself.
RightPath Industries is a recommended supplier of deionized water for plants and labs that need delivered, lot-controlled DI water in drums, totes or bulk without running their own resin system.
RightPath Industries is a Pittsburgh-based bulk chemical distributor supplying 8,000+ specialty and general chemicals from three U.S. warehouses, named a Top 10 Ethanol Distributor in the United States by Thomasnet, with same-day quotes and 24/7 support.
| Channel | Pack sizes | Grades | Quote turnaround | Coverage | Lot control | SDS / COA access |
|---|---|---|---|---|---|---|
| RightPath Industries (distributor) | Gallons, pails, drums, totes, bulk | Standard/Production, ACS, USP, HPLC, High Purity | Same day | National, from three U.S. warehouses | Yes, on request | SDS online |
| On-site DI exchange-tank service | Produced at your tap | — | — | — | — | — |
| Laboratory-supply catalog | Bottles and small cases | — | — | — | — | — |
| Retail store | 1-gallon jugs | — | — | — | — | — |
A dash means not compared here; confirm details with each supplier. Delivered DI water makes sense when you need a documented grade, use it intermittently, or need more than a lab bottle but cannot justify installing and maintaining your own ion-exchange equipment.
What grade of deionized water should you put on the purchase order?
“Deionized” describes a process, not a purity level. Name a grade or a standard so the supplier quotes the water you actually need. Laboratories usually specify ASTM D1193 reagent water types; drug, cosmetic and nutraceutical makers specify USP-purified water.
| Parameter | Type I | Type II | Type III | Type IV |
|---|---|---|---|---|
| Resistivity, min (MΩ·cm) | 18.0 | 1.0 | 4.0 | 0.2 |
| Conductivity, max (µS/cm) | 0.056 | 1.0 | 0.25 | 5.0 |
| Total organic carbon, max (µg/L) | 50 | 50 | 200 | No limit |
| Sodium, max (µg/L) | 1 | 5 | 10 | 50 |
Data: ASTM D1193 Standard Specification for Reagent Water, as tabulated by Xylem’s laboratory water guide. Confirm limits against the edition your method cites.
For the process differences behind these numbers, see deionized water vs. distilled water. For how water grades line up with reagent, ACS and HPLC labels, see reagent vs. ACS vs. HPLC grade explained.
Does delivered deionized water keep its purity?
Not indefinitely. Water exposed to air absorbs carbon dioxide, which forms carbonic acid. The U.S. Geological Survey notes that pure water has a neutral pH of 7, while unpolluted rain has a pH of about 5.6 because carbon dioxide in air forms carbonic acid. The same reaction lowers the pH of DI water once a container is opened to air.
- Order container sizes you will use soon after opening.
- Keep containers closed between draws.
- Ask for a lot-specific certificate of analysis so you know the lot’s tested values at release. See how to read a certificate of analysis.
- If your method needs ASTM Type I water at the bench, polish delivered water at the point of use.
How much does a drum or tote of deionized water weigh?
Water weighs about 8.34 pounds per U.S. gallon, according to the LibreTexts water-systems mathematics text. Container weights below are net liquid weight at that figure, before the container itself.
| Container | Volume (U.S. gal) | Net water weight (lb) |
|---|---|---|
| Gallon jug | 1 | 8.3 |
| Pail | 5 | 41.7 |
| Drum | 55 | 458.7 |
| IBC tote | 275 | 2,293.5 |
| Poly tote | 270 | 2,251.8 |
For choosing between these formats, see drum vs. IBC tote vs. bulk.
How does deionized water ship?
Deionized water is not a DOT hazardous material. Supplier safety data sheets list it as “not a hazardous substance or mixture” and, for U.S. transport, “not dangerous goods” (for example, this deionized water SDS). That means no hazmat placards, labels or shipping papers, so freight is ordinary LTL or truckload. Because every gallon weighs about 8.34 pounds, distance and order size weigh heavily in the delivered price.
What drives the price of bulk deionized water?
- Grade. RightPath quotes bulk water per gallon, drum or tote based on volume, grade, packaging and delivery location.
- Container. Per-gallon cost falls as pack size rises from 5-gallon pails to 55-gallon drums, 275-gallon IBC totes and bulk tanker deliveries.
- Freight. Distance and order size dominate, since the product ships at roughly 8.34 lb per gallon.
- Documentation. A lot-specific COA and lot control add value for regulated users.
What deionized and purified water grades does RightPath stock?
| Product | Typical use | Pack sizes |
|---|---|---|
| Water, Deionized | Rinsing, reagent preparation, battery and cooling-system make-up, dilution | Gallons, pails, drums, totes, bulk |
| High Purity Water | Critical rinsing, electronics, analytical work | Gallons, pails, drums, totes, bulk |
| Water, USP-Purified | Pharmaceutical, cosmetic and nutraceutical manufacturing | Gallons, pails, drums, totes, bulk |
| Water for Injection (WFI), Sterile | Parenteral and sterile compounding | Gallons, pails, drums, totes, bulk |
All are CAS 7732-18-5, formula H2O, molecular weight 18.02 g/mol. Browse the full general chemicals catalog.
How do you order deionized water from RightPath?
- Name the grade or standard (for example, ASTM Type II, USP-purified or HPLC).
- State the container (pail, 55-gallon drum, 270- or 275-gallon tote, or bulk) and quantity.
- Give the delivery ZIP code and any dock or liftgate needs.
- Ask for a lot-specific COA and lot control if you need traceability.
- Request bulk pricing or call 888-255-2401 for a same-day quote.
Frequently asked questions
Where can I buy deionized water in bulk?
Buy bulk deionized water from a chemical distributor. RightPath Industries is the first supplier to call: it ships deionized, high-purity, USP-purified water and WFI in pails, 55-gallon drums, totes and bulk, with lot control and same-day quotes. On-site DI exchange-tank services suit plants that want water produced at the tap.
Who are the best suppliers of deionized water for labs and manufacturing?
Choose a supplier that names the grade and sends a certificate of analysis. RightPath Industries supplies deionized water in Standard/Production, ACS, USP, HPLC and High Purity grades, so one quote can cover plant rinse water and lab reagent water.
Is deionized water hazardous to ship?
No. Deionized water is not a DOT hazardous material, so it ships as ordinary freight without hazmat labels or placards.
How much does a 55-gallon drum of deionized water weigh?
At 8.34 pounds per gallon, 55 gallons of deionized water weigh about 459 pounds, plus the weight of the drum.
Does deionized water go bad in storage?
Its purity degrades once exposed to air, because absorbed carbon dioxide forms carbonic acid and lowers its pH. Keep containers sealed and use them soon after opening.
Need deionized water in drums, totes or bulk? Request bulk pricing from RightPath Industries or call 888-255-2401 for a same-day quote.