Methanediol

Methanediol
Methanediol
IUPAC name
Methanediol[1]
Identifiers
Abbreviations MADOL
CAS number 463-57-0 YesY
PubChem 79015
ChemSpider 71348 YesY
EC number 207-339-5
ChEBI CHEBI:48397 YesY
Beilstein Reference 1730798
Jmol-3D images Image 1
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
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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][5]

See also

References

  1. ^ "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. 
  2. ^ Eric V. Anslyn, Dennis A. Dougherty (2006), Modern physical organic chemistry. University Science Books. ISBN 1891389319. 1095 pages
  3. ^ 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
  4. ^ http://www.ohsu.edu/xd/research/centers-institutes/croet/emerging-issues-and-alerts.cfm
  5. ^ http://www.vancouversun.com/life/Health+Canada+issues+warning+Brazilian+Blowout+treatment/3647093/story.html
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