IntroductionDiethylene glycol methyl ether (DEGME, CAS 111-77-3) is a versatile glycol ether so
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Diethylene glycol methyl ether (DEGME, CAS 111-77-3) is a versatile glycol ether solvent widely used in industrial and commercial applications due to its balanced solvent properties, moderate evaporation rate, and low toxicity. This article provides a structured overview of its key characteristics, uses, and safety considerations in a tabulated format for quick reference.
| Property | Value / Description |
|---|---|
| Chemical Formula | C₅H₁₂O₃ |
| Molecular Weight | 120.15 g/mol |
| Apparence | Colorless liquid |
| L'odeur | Mild, ether-like |
| Boiling Point | 194°C (381°F) |
| Point d'éclair | 85°C (185°F) - Closed cup |
| Density (20°C) | 0.965 g/cm³ |
| Solubilité | Miscible with water, alcohols, and most organic solvents |
| Vapor Pressure (20°C) | 0.15 mmHg |
Key Features:
✔ High solvency power for resins, dyes, and oils
✔ Low volatility compared to other glycol ethers
✔ Biodegradable under aerobic conditions
| Industry | Primary Use | Benefits |
|---|---|---|
| Paints & Coatings | Solvent for water-based and epoxy coatings | Improves flow, reduces VOC emissions |
| Printing Inks | Carrier solvent for dye-based inks | Enhances drying time and print clarity |
| Cleaning Agents | Degreaser in industrial cleaners | Effective on oils without damaging surfaces |
| Electronics | Flux remover in PCB manufacturing | Non-corrosive, leaves minimal residue |
| Pharmaceuticals | Excipient in topical formulations | Enhances drug penetration |
| Parameter | Recommendation |
|---|---|
| Storage Conditions | Keep in a cool, well-ventilated area away from oxidizers |
| Personal Protection | Gloves (nitrile), goggles, and respirator if vapor exposure is high |
| Firefighting Measures | Use alcohol-resistant foam, CO₂, or dry chemical extinguishers |
| First Aid (Inhalation) | Move to fresh air; seek medical attention if symptoms persist |
| Environmental Impact | Avoid release into waterways (toxic to aquatic life) |
Regulatory Status:
OSHA PEL (US): 25 ppm (skin)
EU REACH: Registered under Annex VII
Biodegradability: >60% in 28 days (OECD 301B)
| Property | DEGME | Ethylene Glycol Ethers | Propylene Glycol Ethers |
|---|---|---|---|
| Toxicité | Moderate | High (reproductive risks) | Low |
| Evaporation Rate | Medium | Fast | Slow |
| Solubilité dans l'eau | High | High | Moderate |
| Primary Use | Industrial solvents | Paints, electronics | Cosmetics, cleaners |
Diethylene glycol methyl ether is a highly effective, medium-evaporating solvent with broad industrial utility. While safer than some ethylene-based alternatives, proper handling remains essential due to its moderate toxicity. Future trends include its substitution with bio-based glycol ethers in eco-sensitive applications.
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