Methanediol

Methanediol
Names
Preferred IUPAC name
Methanediol
Other names
  • Formaldehyde hydrate
  • Formaldehyde monohydrate
  • Methylene glycol
Identifiers
3D model (JSmol)
Abbreviations MADOL
1730798
ChEBI
ChemSpider
ECHA InfoCard 100.006.673
EC Number
  • 207-339-5
UNII
  • InChI=1S/CH4O2/c2-1-3/h2-3H,1H2 Y
    Key: CKFGINPQOCXMAZ-UHFFFAOYSA-N Y
  • OCO
Properties
CH4O2
Molar mass 48.041 g·mol−1
Appearance Colourless liquid
Density 1.199 g/cm3
Boiling point 194 °C (381 °F; 467 K) at 101 kPa
Vapor pressure 16.1 Pa
Acidity (pKa) 13.29
1.401
Hazards
Flash point 99.753 °C (211.555 °F; 372.903 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

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. In aqueous solutions it coexists with oligomers (short polymers). The compound is closely related and convertible to the industrially significant derivatives paraformaldehyde ((CH2O)n), formaldehyde (H2C=O), and 1,3,5-trioxane ((CH2O)3).

Methanediol is a product of the hydration of formaldehyde. The equilibrium constant for hydration is estimated to be 103,CH2(OH)2 predominates in dilute (<0.1%) solution. In more concentrated solutions, it oligomerizes to HO(CH2O)nH.

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