Mono ethylene glycol is an organic compound with the chemical formula (CH2OH) 2, which is mainly used as a raw material in the manufacture of polyester fibers and in antifreeze formulations.
Mono ethylene glycol was first produced by a French chemist. Over time, due to the desirable properties of this solvent such as high strength and hydrophobicity, its applications have expanded greatly, Shanghai Chemex company provides this chemical with the best quality for you.
In the following, we will learn more about the physical and chemical properties as well as the wide applications of this material.
Physical and Chemical Properties:
Pure mono ethylene glycol is a toxic, clear, colorless liquid with a mild, sweet-tasting, syrupy concentration.
This compound is miscible with water and aromatic and aliphatic hydrocarbons and has a good heat transfer ability and is usually used by systems that require a constant temperature.
The most important physical and chemical properties of this organic compound can be summarized in the following table:
| Name | (MEG) |
| Chemical formula | (CH2OH) 2 |
| Molecular weight (g/mol) | 62.07 |
| Appearance | colorless liquid |
| odor | Odorless |
| Density (g/cm³) | 1.11 |
| Boiling point (°C) | 197 |
| Melting point (°C) | -12.9 |
| PH | 5.5-8 |
| Solubility | Soluble in most organic solvents |
| Chemical Structure Depiction | 
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The Production Process of MEG:
Monoethylene glycol is produced from ethylene by an intermediate called ethylene oxide. In this process, EO and water react together and ethylene glycols including MEG, DEG, and TEG (triethylene glycol) are produced. One of the interesting points about this reaction is that the reaction can be performed in environments with different pH, but to achieve higher efficiencies, it is recommended to perform the reaction in an acidic or neutral environment with excessive amounts of water.
Production stages:
Ethylene and oxidizing agents are first introduced into a reactor, the product of this reaction is ethylene oxide. This reaction is considered exothermic and takes place in the gas phase with silver catalysts. During the process, water vapor is produced by the heat of the reaction.
The product obtained from the reactor is sent to the ethylene oxide (EO) adsorption unit. Some of the gas vapor is returned to the reactor and the rest is sent to the carbon dioxide removal unit, which includes an adsorbent and a stripper. In this unit, carbon dioxide is separated for use in the production of ethylene carbonate.
After this step, the diluted vapor of ethylene oxide is removed from the adsorbent and concentrated during the process.
Finally, pure ethylene oxide is hydrolyzed to produce mono ethylene glycol and carbon dioxide, a reaction that usually takes place in the liquid phase.
Mono Ethylene Glycol Uses:
Among the important and industrial applications of mono ethylene glycol (MEG) are the following:
- As a raw material for the manufacture and preparation of polymers such as polyesters and polyethylene terephthalate
- For the production of various polymer resins
- Rubber industry (for the production of polymers, fibers, and polyester resins)
- As a cooling material and facilitates heat transfer in air conditioning systems
- Preventing water freezing inside chillers and cooling equipment in industries
- The main component of car antifreeze formulation
- As a dehydrator to remove water molecules from natural gas
- To synthesize some carbonyl organic compounds
- In the construction of capacitors
- As an additive to prevent corrosion of liquid cooling systems for personal computers and cathode-ray tubes of projector TVs
- In the manufacture of some vaccines
- In the preparation and production of shoe rubber
- For wood fungus
- In the preparation and manufacture of fiberglass
- In the ink industry to reduce viscosity, high cost, and volatility
Mono Ethylene Glycol as a Coolant and Antifreeze:
As mentioned, one of the most important applications of ethylene glycol is its use in the production of antifreeze. The chemical dissolution of this compound in water causes the hydrogen bond of the water to be overshadowed and fused, causing the freezing point.
To produce antifreeze based on mono ethylene glycol, a certain amount of this substance is mixed with water and a suitable corrosion inhibitor and repellent. It is better not to use more than 70% of MEG, using corrosion inhibitors in this formulation is necessary. like Propylene glycol
Buy Mono Ethylene Glycol(MEG):
For more information on purchasing and ordering this product, please contact our experts in Shanghai Chemex through the numbers on the site.
Safety; hazards and poisoning of mono ethylene glycol:
This compound is classified in the list of toxic and dangerous substances for human health, and swallowing, skin and eye contact, and breathing should be avoided. In case of contact with skin and eyes, rinse immediately with plenty of running water and drink plenty of fluids if swallowed.
The major danger of mono ethylene glycol is its environmental threat. Because of its liquid nature, it easily penetrates the soil and can lead to groundwater pollution.
Due to the high toxicity of this substance, its use is prohibited in the following cases:
- Water consumption equipment
- In the manufacture and formulation of food, medicine, and cosmetics
- As antifreeze in water tanks
- Antifreeze in fire extinguishing systems
Packing and Storage:
Use a cool and dry place to store this chemical away from heat and direct sunlight.
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