Methanediol
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| Names | |||
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| IUPAC name
Methanediol[1]
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| Identifiers | |||
3D model (JSmol)
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| Abbreviations | MADOL | ||
| 1730798 | |||
| ChEBI | |||
| ChemSpider | |||
| ECHA InfoCard | 100.006.673 | ||
| EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |||
| CH4O2 | |||
| Molar mass | 48.041 g·mol−1 | ||
| Appearance | Colourless liquid | ||
| Density | 1.199 g cm−3 | ||
| Boiling point | 194 °C (381 °F; 467 K) | ||
| Vapor pressure | 16.1 Pa | ||
Refractive index (nD)
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1.401 | ||
| Hazards | |||
| Flash point | 99.753 °C | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Methanediol, also known as formaldehyde monohydrate or methylene glycol, is a chemical compound with chemical formula CH4O2, or H2C(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,[2] and a 5% by weight solution of formaldehyde in water is 80% methanediol.
The compound is of some relevance to astrochemistry.[3]
Methanediol is listed as one of the main ingredients of "Brazilian blowout", a hair-straightening formula marketed in the US — even though the California-based manufacturer claims that the product contains no formaldehyde.[4]
See also
- Orthoformic acid (methanetriol)
- Orthocarbonic acid (methanetetraol)
References
- ^ "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 1891389319. 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
- ^ http://www.osha.gov/SLTC/formaldehyde/hazard_alert.html
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