Monoethylene Glycol (MEG) also known simply as ethylene glycol, is an organic compound with the chemical formula C₂H₆O₂. It is a colorless, odorless, sweet-tasting liquid that is widely used in various industrial and commercial applications.

Applications of Monoethylene Glycol:

Antifreeze and Coolants:
One of the most common uses of MEG is in automotive antifreeze and coolants. It helps lower the freezing point of water and raise the boiling point, preventing the engine from freezing in winter and overheating in summer. It’s also used in cooling systems for air conditioning, industrial cooling systems, and heat exchangers.
Polyester Production:
MEG is a key raw material in the production of polyethylene terephthalate (PET), which is used to make polyester fibers for textiles and plastic bottles. It is polymerized with terephthalic acid to form PET, which is used in a variety of consumer products.
Solvent:
MEG is used as a solvent in several industries. It dissolves oils, resins, and other substances and is used in the production of paints, varnishes, inks, and coatings.
De-icing Agent:
MEG is used as a de-icing agent for airports, roads, and vehicles in cold climates. It helps to prevent the formation of ice on surfaces, ensuring better safety and efficiency during winter months.
Chemical Synthesis:
MEG is an intermediate in the production of other chemicals such as ethylene oxide, which is used to make detergents, surfactants, and other industrial chemicals.
Plasticizers:
It is used in the production of plasticizers to improve the flexibility and durability of plastics.
Hydraulic Fluids and Brake Fluids:
MEG is sometimes used in hydraulic fluids and brake fluids, where its high boiling point and low freezing point make it useful for systems that operate under extreme temperature conditions.