Monoethylene glycol (MEG) is a clear, colorless, and viscous liquid with a slightly sweet taste and no odor. It is produced through a reaction between ethylene oxide and water. MEG is soluble in water, alcohols, and various organic compounds, with a chemical formula of C₂H₆O₂.

Diethylene glycol (DEG) is an organic compound with the formula (HOCH₂CH₂)₂O. This colorless, nearly odorless, hygroscopic liquid has a mildly sweet taste and consists of a four-carbon dimer of ethylene glycol. It is miscible with water, alcohol, ether, acetone, and ethylene glycol, making it a versatile and widely used solvent.

Triethylene glycol (TEG), also known as triglycol, is a colorless, odorless, and stable liquid with high viscosity and a high boiling point. Known for its hygroscopic properties and effectiveness in dehumidifying fluids, TEG is commonly used as a raw material in the synthesis of various products. This liquid is fully miscible with water and serves as a plasticizer for vinyl polymers, as well as a component in air sanitizer products.