Ethylene glycol (CAS 107-21-1), also known as monoethylene glycol (MEG), is a widely used industrial chemical valued for its exceptional thermal properties and solvent characteristics. It serves as a key raw material in the production of polyester, PET, and antifreeze.
| Property | Value |
|---|---|
| Chemical Name | Ethylene Glycol |
| CAS Number | 107-21-1 |
| Molecular Formula | C₂H₆O₂ |
| Molecular Weight | 62.07 g/mol |
| Appearance | Clear, colorless liquid |
| Odor | Odorless |
| Melting Point | −12.9 °C |
| Boiling Point | 197.3 °C |
| Density (20 °C) | ~1.11 g/cm³ |
| Solubility | Completely miscible with water |
important Chemical Characteristics
- Low volatility and high boiling point
- Excellent heat transfer performance
- Strong hygroscopic behavior (absorbs moisture)
- Good solvent compatibility with many organic compounds
What Is Ethylene Glycol MEG chemical Used for?
Coolant and Antifreeze
Ethylene glycol serves as an antifreeze agent in engine cooling systems. It lowers the freezing point of water, protecting engines in cold climates and enhancing the thermal conductivity efficiency of the cooling system.
Polyester Production
Ethylene glycol is a key raw material for producing polyethylene terephthalate (PET), widely used in the manufacture of bottles, packaging materials, textile fibers, and plastic films. In this process, ethylene glycol reacts with terephthalic acid to form high-performance polymers, materials in high demand across the food and textile industries.
Other Applications
It also serves as a solvent in formulations for inks, coatings, brake fluids, and wetting agents. Within the electronics industry, it functions as a thermal control medium for thermosensitive components.
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