Why We're Here

Dihydrogen monoxide parody

Dihydrogen monoxide is a name for the water molecule, which comprises two hydrogen atoms and one oxygen atom (H2O).

The dihydrogen monoxide parody involves calling water by an unfamiliar chemical name, usually "dihydrogen monoxide" (DHMO), and listing some of water's properties in a particularly alarming manner, such as accelerating corrosion (rust) and causing suffocation (drowning). The parody often calls for dihydrogen monoxide to be banned, regulated, or labeled as dangerous. It plays into chemophobia and demonstrates how a lack of scientific literacy and an exaggerated analysis can lead to misplaced fears. The parody has been used with other chemical names for water, such as hydrogen hydroxide, dihydrogen oxide, and hydric acid.

History
In 1983 on April Fools' Day, an edition of the Durand Express, a weekly newspaper in Durand, Michigan, reported that "dihydrogen oxide" had been found in the city's water pipes, and warned that it was fatal if inhaled, and could produce blistering vapors. The first appearance of the parody on the Internet was attributed by the Pittsburgh Post-Gazette to the "Coalition to Ban Dihydrogen Monoxide", a parody organization at the University of California, Santa Cruz following on-campus postings and newsgroup discussions in 1990.

This new version of the parody was created by housemates while attending UC Santa Cruz, in 1989–1990, revised by Craig Jackson in 1994, and brought to widespread public attention in 1997 when Nathan Zohner, a 14-year-old student, gathered petitions to ban "DHMO" as the basis of his science project, titled "How Gullible Are We?"

Jackson's original site included the following warning:

Dihydrogen monoxide:

• is also known as hydroxyl acid, and is the major component of acid rain.
• contributes to the "greenhouse effect".
• may cause severe burns.
• contributes to the erosion of our natural landscape.
• accelerates corrosion and rusting of many metals.
• may cause electrical failures and decreased effectiveness of automobile brakes.
• has been found in excised tumors of terminal cancer patients.

Despite the danger, dihydrogen monoxide is often used:

• as an industrial solvent and coolant.
• in nuclear power plants.
• in the production of styrofoam.
• as a fire retardant.
• in many forms of cruel animal research.
• in the distribution of pesticides. Even after washing, produce remains contaminated by this chemical.
• as an additive in certain "junk-foods" and other food products.

A mock material safety data sheet has also been created for H2O.