|Jmol-3D images||Image 1|
|Molar mass||48.04 g mol−1|
|Density||1.199 g cm−3|
194 °C, 467 K, 381 °F (at 101 kPa)
|Vapor pressure||16.1 Pa|
|Refractive index (nD)||1.401|
|Flash point||99.753 °C|
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Methanediol, also known as formaldehyde monohydrate or methylene glycol, is an organic compound with chemical formula CH2(OH)2. It is the simplest geminal diol, and formally the second simplest carbohydrate (after formaldehyde).
Methanediol is a product of the hydration of formaldehyde H2C=O, and predominates in water solution: the equilibrium constant being about 103, and a 5% by weight solution of formaldehyde in water is 80% methanediol.
Methanediol is listed as one of the main ingredients of "Brazilian blowout", a hair-straightening formula marketed in the US. The equilibrium with formaldehyde may cause some concern as formaldehyde in hair straighteners is a health hazard.
- "Methanediol - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 20 October 2011.
- Eric V. Anslyn, Dennis A. Dougherty (2006), Modern physical organic chemistry. University Science Books. ISBN 1-891389-31-9. 1095 pages
- A theoretical study of the conversion of gas phase methanediol to formaldehyde Kent DR, Widicus SL, Blake GA, Goddard WA The Journal of Chemical Physics -- September 8, 2003 -- Volume 119, Issue 10, pp. 5117-5120 doi:10.1063/1.1596392
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