Dihydrogen monoxide parody

The dihydrogen monoxide parody involves referring to water (H2O) by its unfamiliar chemical systematic name "dihydrogen monoxide" (DHMO) and describing some properties of water in a particularly concerning manner – such as the ability to accelerate corrosion (rust) and cause suffocation (drowning) – often calling for it to be banned, regulated strictly, or labeled as a hazardous chemical. The motivation behind the parody is to play into chemophobia, and to demonstrate how exaggerated analysis, information overload, and a lack of scientific literacy can lead to misplaced fears.

Occasionally, reports also reference its widespread contamination of rivers or municipal water supplies. The parody has also involved other uncommon chemical nomenclatures for water such as "hydrogen hydroxide", "dihydrogen oxide" and "hydric acid".