eli5: Why can’t you drink Demineralised Water?

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At my local hardware store they sell something called “Demineralised Water High Purity” and on the back of the packaging it says something like, “If consumed, rinse out mouth immediately with clean water.”

Why is it dangerous if it’s cleaner water?

In: Chemistry

19 Answers

Anonymous 0 Comments

The demineralized water at the hardware store isn’t rated for human consumption.

Selling drinking water requires you bottle it in food safe bottles, in a sterile facility that has been inspected, while getting your water from a safe source that has been tested.

Demineralized water generally starts with perfectly safe water from a municipal source, but it’s bottled on equipment that they don’t bother rating/inspecting for human drinking. It’s cheaper to just put a tag on it that says NOT DRINKING WATER.

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