In the context of industrial chemicals, TEG most commonly stands for Triethylene Glycol (C₆H₁₄O₄), also known as triglycol or 2,2′-[Ethane-1,2-diylbis(oxy)]di(ethan-1-ol). It is a clear, colorless, viscous, and hygroscopic liquid with a mild, sweetish odor. It is the third member of the glycol family, following MEG (Monoethylene Glycol) and DEG (Diethylene Glycol).