|Preferred IUPAC name
Diethylene glycol dimethyl ether
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||134.175 g·mol−1|
|Melting point||−64 °C (−83 °F; 209 K)|
|Boiling point||162 °C (324 °F; 435 K)|
|Toxic (T) |
|R-phrases (outdated)||R60 R61 R10 R19|
|S-phrases (outdated)||S53 S45|
|Flash point||57 °C (135 °F; 330 K)|
|Diethylene glycol diethyl ether, ethylene glycol dimethyl ether|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Diglyme, or bis(2-methoxyethyl) ether, is a solvent with a high boiling point. It is an organic compound which is the dimethyl ether of diethylene glycol. (The name "diglyme" is a portmanteau of "diglycol methyl ether.") It is a colorless liquid with a slight ether-like odor. It is miscible with water as well as organic solvents.
Because of its resiliance to strong bases, diglyme is favored as a solvent for reactions of alkali metal reagents even at high temperatures. Therefore, reactions involving organometallic reagents, such as Grignard reactions or metal hydride reductions, may have significantly enhanced reaction rates.
The European Chemicals Agency lists diglyme as a Substances of Very High Concern (SVHC) as a Reproductive Toxin.