Methanediol
| Methanediol | |
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Methanediol[1] |
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| Identifiers | |
| Abbreviations | MADOL |
| CAS number | 463-57-0  |
| PubChem | 79015 |
| ChemSpider | 71348 |
| EC number | 207-339-5 |
| ChEBI | CHEBI:48397 |
| Beilstein Reference | 1730798 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | CH4O2 |
| Molar mass | 48.04 g mol−1 |
| Exact mass | 48.021129372 g mol−1 |
| Appearance | Colourless liquid |
| Density | 1.199 g cm−3 |
| Boiling point |
194 °C, 467 K, 381 °F (at 101 kPa) |
| Vapor pressure | 16.1 Pa |
| Refractive index (nD) | 1.401 |
| Hazards | |
| Flash point | 99.753 °C |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
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]
[edit] See also
[edit] References
- ^ "Methanediol - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=79015. 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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