Tetraethylene glycol monomethyl ether
CAS 23783-42-8
EC 245-883-5
Formula C9H20O5
MW 208.25 g/mol
Alcohols & Glycols Lubricants & MetalworkingPrinting & PackagingPharmaceuticals & HealthcarePersonal Care & Cosmetics Solvent & CarrierHumectant & Moisturizing
Description
Tetraethylene glycol monomethyl ether (CAS 23783-42-8) is a polyethylene glycol-based ether solvent, also known commercially as mPEG-4-OH, Methyl Tetraglycol, and Methoxytetraethylene glycol. It carries no assigned E-code and is catalogued under EC 245-883-5. Its mid-range molecular weight positions it between shorter glycol ethers and higher-MW PEG derivatives.
In pharmaceutical formulations, it functions as a carrier solvent that improves active ingredient solubility and membrane permeation. Personal care chemists use it as a humectant, where its hygroscopic ether-oxygen backbone draws and retains moisture within skin formulations. In metalworking fluids, it acts as a coupling solvent, stabilising emulsions and reducing interfacial tension between oil and water phases.
This material is supplied as a liquid and is subject to REACH registration requirements within the EU. It is classified under HS code 29094990 for import and export purposes. Procurement teams should confirm grade specifications and available pack sizes directly with our sales team.
In pharmaceutical formulations, it functions as a carrier solvent that improves active ingredient solubility and membrane permeation. Personal care chemists use it as a humectant, where its hygroscopic ether-oxygen backbone draws and retains moisture within skin formulations. In metalworking fluids, it acts as a coupling solvent, stabilising emulsions and reducing interfacial tension between oil and water phases.
This material is supplied as a liquid and is subject to REACH registration requirements within the EU. It is classified under HS code 29094990 for import and export purposes. Procurement teams should confirm grade specifications and available pack sizes directly with our sales team.
Physical Properties
| Boiling Point | 135 °C @ Press: 0.25 Torr |
| Density | 1.0357 g/cm³ @ Temp: 50 °C; Press: 750 Torr |
| Flash Point | >110°C |
| Appearance | CLEAR COLOURLESS TO VERY SLIGHTLY YELLOW LIQUID |
| Color | Clear colorless to very slightly yellow |
| Form | Liquid |
| Water Solubility | Water solubility 999,999c. |
| Vapor Pressure | 0.1Pa at 20℃ |
| Refractive Index | 1.444-1.446 |
| Log P | -1.5 at 20℃ |
Trade & Regulatory
| HS Code | 29094990 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 1 |
Other Names
2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethanol3,6,9,12-TetraoxotridecanolTetraethylene Glycol Methyl EtherTetraethyleneglycol monomethyl ether2-{2-[2-2-(Methoxy-Ethoxy)-Ethoxy]-Ethoxy}-EthanolmPEG-4-OHMETHYL TETRAGLYCOL3,6,9,12-tetraoxatridecanol
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