| Customization: | Available |
|---|---|
| CAS No.: | 107-21-1 |
| Formula: | C2h6o2 |
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| Name | Ethylene glycol |
| Synonyms | 1,2-Ethanediol; Monoethylene glycol |
| Molecular Structure | |
| Molecular Formula | C2H6O2 |
| Molecular Weight | 62.07 |
| CAS Registry Number | 107-21-1 |
| EC Number | 203-473-3 |
| SMILES | C(CO)O |
| Density | 1.113 g/mL |
|---|---|
| Melting point | -13 ºC |
| Boiling point | 196-198 ºC |
| Refractive index | 1.43-1.433 |
| Flash point | 116 ºC |
| Water solubility | miscible |
Ethylene glycol is the simplest diol, which is a colorless, odorless, and sweet viscous liquid at room temperature. It is soluble in water and various organic solvents such as acetone and ethanol, but insoluble in ethers and petroleum hydrocarbons. Its melting point is -12.6 ºC and boiling point is 197.3 ºC, combining the characteristics of low freezing point and high boiling point, making it an ideal antifreeze and industrial solvent.
Main purpose
1. Polyester production
Ethylene glycol is the core raw material for producing polyester:
Polyester fiber (polyester): reacts with terephthalic acid to produce polyethylene terephthalate (PET), accounting for over 90% of global ethylene glycol consumption.
Polyester plastic: used for food packaging bottles, electronic appliance casings, etc.
Unsaturated polyester resin: used for manufacturing fiberglass products (such as ships and pipelines) and coatings.
2. Antifreeze
Car coolant: After mixing with water, the freezing point significantly decreases, protecting the engine from normal operation at low temperatures.
Industrial antifreeze: used for equipment protection in low-temperature environments (such as surgical instruments).
3. Solvent and Chemical Intermediates
High boiling point solvents: used to dissolve resins, dyes, and inks, and are applied in electronic industry cleaning and photoresist preparation.
Surfactants: Synthetic polyethylene glycol ethers used in detergents, textile auxiliaries, and petroleum extraction.
4. Pharmaceuticals and cosmetics
Moisturizing agent: added to skincare products (moisturizers, lotions) to lock in moisture.
Drug carrier: Dissolve drug components to form injections or oral liquids (requiring strict purification).
5. Industrial lubrication and cooling
Cutting fluid/grinding fluid: Ethylene glycol aqueous solution has cooling, lubrication, and rust prevention functions.
Lubricant additive: improves the fluidity of oil products in low-temperature environments.
6. Other applications
Gas dehydration: Removing moisture from natural gas to prevent pipeline blockage.
Plasticizers: Improve the flexibility of rubber and plastic.
Explosives and inks: Participate in the synthesis of energetic materials such as nitroglycerin and serve as ink solvents.
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