Monoethylene Glycol (MEG) is an organic chemical compound with the chemical formula HOCH₂CH₂OH. It is a clear, colorless, odorless, and viscous liquid that is widely used in various industries due to its special physical and chemical properties.

Chemical structure and physical properties
Structure: Monoethylene glycol has two hydroxyl groups (OH) attached to an ethylene chain.
Physical properties:
Solubility: Miscible in water and many organic solvents.
Viscosity: It has a moderate viscosity.
Boiling point: It has a relatively high boiling point.
Density: It is denser than water.

Applications of monoethylene glycol

Antifreeze: The main use of monoethylene glycol is as an antifreeze in automotive and industrial cooling systems.
Solvent: It is used as a solvent in the production of paints, resins, inks, and some other chemicals.
Plasticizer: Used as a plasticizer in the production of synthetic fibers and plastics.
Raw material: Used as a raw material in the production of polyethylene terephthalate (PET), which is used in the manufacture of plastic bottles.
Desiccant: Used as a desiccant in some industries due to its moisture absorption properties.