Deionized Water (DI water) is water with nearly all dissolved mineral ions removed by ion exchange, giving a resistivity up to 18 megohm-cm. It is used in electronics and semiconductor manufacturing, laboratories, pharmaceuticals, cosmetics, battery and coolant mixing, and final rinse of plated or painted parts. High-purity water readily picks up ions from metals, so clean polyethylene or polypropylene tanks are preferred. Use the compatibility ratings to choose the right tank resin, fittings and gaskets.
HDPE is the most economical tank material for Water, Deionized, rated Excellent. Polypropylene, nylon and PVDF (Kynar®) are also rated Good or better.
How Water, Deionized works with the plastics used to make our storage tanks.
| Material | Rating |
|---|---|
| HDPE | |
| Polypropylene | |
| Nylon | |
| PVDF (Kynar®) |
How Water, Deionized works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | |
| PVC | |
| CPVC | |
| Polypropylene | |
| PVDF |
How Water, Deionized works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | |
| EPDM | |
| Viton® |
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