Is it safe to drink deionized water?
Deionized water simply means that certain dissolved stuff has been taken out of it. It is a step below distilled water. Most things that dissolve in water become ions. Ions are simply charged atoms (or groups of atoms). For instance, when salt, which is NaCl (sodium chloride), is dissolved in water, it separates into its constituent ions, Na+ (the + means it is positively charged) and Cl- (which is negatively charged.) So salty water, and also barbecue sauce and mineral water, all have lots of ions. Most inorganic (not from living sources) compounds that dissolve in water will separate into ions. So when water is deionized, most of the inorganic impurities are removed. It would not have any dissolved minerals or heavy metals like lead or mercury, for instance. However, it could still have dissolved organic compounds, which don’t form ions when you dissolve them. Examples might include alcohol, sugar, or more realistically, nitrates like you find in fertilizer or pesticides. So deionize
