The difference between ethylene glycol methyl ether and ethylene glycol monomethyl ether
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I looked up some information, including MSDS data, and couldn’t see any differences; they seem very similar to me, but I’m not sure what the fundamental difference is – or if they are actually the same thing ? Please ask a professional for guidance. .
1# houyanxue From a molecular structure perspective, ethylene glycol methyl ether is formed by the etherification of one ethylene glycol molecule with two methyl ether molecules, containing two ether bonds； Ethylene glycol monomethyl ether is formed by the etherification of one ethylene glycol molecule with one methyl ether molecule, and it contains only one ether bond ； Their corresponding chemical properties differ slightly, but their uses are similar; both can be used as organic solvents and are toxic.
This post was last edited by qugd on 2010-5-6 at 13:32. I disagree with the original poster’s explanation. Ethylene glycol methyl ether and ethylene glycol monomethyl ether are different names for the same substance. Ethylene glycol monomethyl ether, or glycol monomethyl ether; national standard code 33569; CAS number 109-86-4; molecular formula C3H8O2; CH3OCH2CH2OH; molecular weight 76.09. It is a colorless liquid with a slight odor; vapor pressure of 0.83 kPa at 20°C; flash point of 39°C; melting point of -86.5°C; boiling point of 124.5°C. Solubility: soluble in water, as well as in alcohols and hydrocarbons. Density: relative density (water=1) 0.97; relative density (air=1) 2.62. Stability: stable. Hazard symbols: 7 (flammable liquid), 14 (toxic substance). Main use: used as a solvent. Ethylene glycol dimethyl ether, GDME, is a diether structure formed by the condensation of ethylene glycol with two molecules of methanol. Molecular formula: C4H10O2 Molecular weight: 90.12 CAS number: Density: 0.8664 Melting point: -58°C Boiling point: 85.2°C Flash point: 4.5°C Viscosity: 1.10 Refractive index: 1.3796 Appearance: Colorless liquid with a slight ether odor. Solubility: Soluble in water, chloroform, ethanol, and ether. Use: Used as a solvent for cellulose nitrate, resins, etc. Preparation or source: Obtained from ethylene glycol monomethyl ether and dimethyl sulfate. Note: Freezing point -69°C. It has stable properties and is not prone to chemical changes.
The information I’ve seen is different, but their chemical properties are similar; therefore, in practical use we refer to them collectively. Let’s go by the CAS number