What is the difference between pure water and ultrapure water?

Their conductivity is different. Ultra-pure water is water produced by the U.S. technology industry using distillation, deionization, reverse osmosis, or other appropriate ultra-precise techniques in order to create ultra-pure materials such as semiconductor components and nanoscale ceramic materials. Apart from water molecules (H2O), this water contains almost no impurities, nor any bacteria, viruses, chlorinated dioxins, or other organic substances. It also lacks the mineral trace elements necessary for the human body. Ultra-pure water has no hardness, has a sweet taste, and is often referred to as soft water; it can be consumed directly or after being boiled. Ultra-pure water is a level that is difficult to achieve using conventional processing methods; water with a resistivity of more than 18.2 MΩ*cm (with no clear boundary) is considered ultra-pure water.

It seems it can’t be drunk directly; it’s harmful to the body as it causes many ions in the body to be released

Come in and learn a bit – it’s best not to drink this water; it’s pointless

Pure water refers to water in which both the strong electrolytes that can be easily removed from water, as well as weak electrolytes such as silicic acid and carbon dioxide that are difficult to remove, have been removed to a certain extent. The salt content of pure water is below 1.0 mg/L, and its conductivity is less than 50 μs/cm. High-purity water refers to water in which almost all conductive substances have been removed, and in which undissociated colloidal substances, gases, and organic compounds have also been reduced to very low levels. The salt content of high-purity water is below 0.3 mg/L, and its conductivity is less than 0.2 μS/cm. Ultra-pure water refers to water in which almost all conductive substances have been removed, and in which undissociated colloidal substances, gases, and organic compounds have also been reduced to very low levels. The salt content in high-purity water is below 0.1 mg/L, and the resistivity indicates the limit of water purity: 18.2 MΩ·cm. In addition to strict requirements regarding salt content or conductivity, pure water, high-purity water, and ultra-pure water also have strict limits on the levels of various metal ions, organic substances, particle size and quantity, as well as microbial counts. Water is heated to vaporize, and the water resulting from the condensation of that vapor is known as distilled water. The conductivity of generally distilled water is around 10 μs/cm. By distilling primary distilled water once more to obtain secondary distilled water, and repeating this process multiple times, the conductivity can be reduced to very low levels of around 1.0 μs/cm. Deionized water refers to pure water from which impurities in ionic form have been removed; it is generally produced using the ion exchange method: handshake

I’ve studied it, but I know too little about this area; I should fill in that knowledge properly