1,3-Dimethyl-2-imidazolidinone (DMI) is a cyclic urea
Urea or carbamide is an organic compound with the chemical formula CO2. The molecule has two —NH2 groups joined by a carbonyl functional group....

 used as a high-boiling polar aprotic solvent
A solvent is a liquid, solid, or gas that dissolves another solid, liquid, or gaseous solute, resulting in a solution that is soluble in a certain volume of solvent at a specified temperature...

. It is colourless, transparent, highly polar and has high thermal and chemical stability. It is a homolog
Homology (chemistry)
In chemistry, homology refers to the appearance of homologues. A homologue is a compound belonging to a series of compounds differing from each other by a repeating unit, such as a methylene group, a peptide residue, etcetera....

 of the related solvent DMPU
1,3-Dimethyl-3,4,5,6-tetrahydro-2-pyrimidinone is a cyclic urea sometimes used as a polar, aprotic organic solvent. In 1985, Dieter Seebach showed that it is possible to substitute the relatively toxic hexamethylphosphoramide with DMPU....

. In many applications, DMI (as well as DMPU) can be used as a substitute or replacement for the carcinogenic solvent HMPA
Hexamethylphosphoramide, often abbreviated HMPA, is a phosphoramide having the formula [2N]3PO. This colorless liquid is a useful polar aprotic solvent and additive in organic synthesis.-Structure and reactivity:...


DMI has a boiling point of 225 °C, a flash point of 120 °C and a melting point of 8.2 °C. DMI has excellent solvating ability for both inorganic and organic compounds.

DMI can is used in a variety of applications including detergents, dyestuffs, electronic materials and in the manufacture of polymers.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.