Pure ethylene glycol has a freezing point of roughly -12.9°C (8.6°F) and a boiling pointof 197.3°C (387.1°F).
CAS No. 107-21-1 Ethylene Glycol, also known as monoethylene glycol (MEG) or 1,2-ethanediol, is one of the most widely used industrial glycols in the world. It is commonly applied in:
- Automotive antifreeze
- Industrial coolants
- HVAC systems
- Heat transfer fluids
- Polyester and PET resin manufacturing
- Aircraft deicing fluids
One of the main reasons ethylene glycol CAS 107-21-1 is so valuable is its unique thermal properties, especially its boiling point and freezing point. These characteristics allow MEG to perform effectively in both high-temperature and low-temperature environments.
CAS 107-21-1 EG Boiling Point
The boiling point of ethylene glycol at standard atmospheric pressure is approximately 197.3°C; equivalent values are 387.1°F and 470.5 K.
This relatively high boiling point makes MEG suitable for use in high-temperature heat transfer systems and engine cooling applications.
CAS 107-21-1 EG Freezing Point
The freezing point (melting point) of pure ethylene glycol is approximately −12.9°C; equivalent values are 8.8°F and 260.2 K.
Although the freezing point of pure ethylene glycol is lower than that of water, its true industrial value lies in its use in mixtures with water.
Mono ethylene glycol (MEG) Properties
| CAS Number | 107-21-1 |
| Molecular Formula | C₂H₆O₂ |
| Molecular Weight | 62.07 g/mol |
| Appearance | Colorless transparent liquid |
| Odor | Mild sweet odor |
| Purity (Industrial Grade) | ≥99.5% |
| Density | 1.113 g/cm³ (20°C) |
| Boiling Point | 197.3°C |
| Freezing Point | -12.9°C |
| Flash Point | 111°C (Closed Cup) |
| Autoignition Temperature | 398°C |
| Vapor Pressure | Low |
| Vapor Density | 2.1 (Air = 1) |
| Viscosity | Approx. 16.1 mPa·s (20°C) |
| Refractive Index | Approx. 1.4318 |
| Solubility | Completely miscible with water |
| pH Value | Neutral to slightly acidic |
| Hygroscopicity | Strongly hygroscopic |
| Flammability | Combustible liquid |
| Toxicity | Toxic if swallowed |
CAS 107-21-1 MEG Raw Material Supplier in China
Key Industrial Applications: Based on Boiling and Freezing Points
1. Automotive Antifreeze and Engine Coolant
Ethylene glycol/MEG chemical is widely used in automotive radiator systems due to its ability to:
Prevent the coolant from freezing during winter
Prevent the engine from overheating during summer
Maintain a stable operating temperature for the engine
2. Industrial Heat Transfer Fluids
In chemical plants and processing industries, it is utilized in:
Heat exchangers
Closed-loop heating and cooling systems
Process temperature control systems
Its stability across a wide temperature range ensures highly efficient performance during continuous operation.
3. HVAC and Refrigeration Systems
Ethylene glycol liquid is frequently employed as a secondary refrigerant in the following systems:
Chillers
Air conditioning systems
Cold storage facilities
It facilitates heat transfer while preventing ice formation within the piping.
4. Aircraft De-icing and Anti-icing Fluids
Due to its extremely low freezing point, it is used in the aviation sector to:
Remove accumulated ice from aircraft surfaces
Prevent ice formation on aircraft during takeoff in cold weather
5. Polyester (PET) Production
MEG Mono ethylene glycolserves as a key raw material in the production of:
Polyester fibers (used in clothing and textiles)
PET bottles and packaging materials
In this application, its function is chemical in nature (acting as a monomer), rather than thermal.
6. Industrial De-icing and Thermal Storage Systems
Monoethylene Glycol is also applied in:
Road de-icing formulations (in certain industrial areas)
Thermal energy storage systems (e.g., solar heating, industrial thermal buffering)
Conclusion
Ethylene Glycol has a:
- Boiling point of approximately 197.3°C
- Freezing point of approximately −12.9°C
Due to its ability to lower the freezing point and raise the boiling point in water-based mixtures, ethylene glycol has become one of the most important industrial heat transfer fluids globally.
It is precisely because of these thermodynamic properties that monoethylene glycol (MEG) is widely utilized in antifreeze, coolants, HVAC systems, polyester manufacturing, refrigeration systems, and industrial process fluids.
About us
As a leading manufacturer and exporter of chemical solvent, TIANJIN GNEE BIOTECH CO., LTD. provides high-quality industrial chemicals. We supply to customers across the chemical, pharmaceutical, and materials industries, ensuring consistent quality, reliable logistics, and professional technical support.
Our chemical products hold international certifications (REACH, ISO, FMQS, HALAL) for global quality recognitio. We have warehouses in coreports such as Qingdao, Tianiin, and Shanghai, with a 15-day express delivery service.
Other Hot-Selling Products
| Dimethyl Sulfoxide (DMSO) | CAS 67-68-5 |
| Dichloromethane / Methylene Chloride | CAS 75-09-2 |
| Glacial Acetic Acid / Ethanoic Acid | CAS 64-19-7 |
| Ethyl Acetate / Ethyl Ethanoate | CAS 141-78-6 |
| Ethylene Glycol / Monoethylene Glycol (MEG) | CAS 107-21-1 |
| Trichloroethylene | CAS 79-01-6 |
| Cyclohexanone | CAS 108-94-1 |
Gneebio Product Packaging
| Packaging Type | Net Weight |
|---|---|
| Steel Drum | 250 kg |
| IBC Tank | 1250 kg |
| ISO Tank | Bulk shipment |
Customer Visit
