O-Methyl-undecaethylene glycol is primarily utilized in industrial and research settings as a non-ionic surfactant or emulsifier. Its structure, featuring a long ethylene glycol chain, makes it effective in stabilizing emulsions and reducing surface tension in various formulations. It is commonly employed in the production of detergents, cleaning agents, and personal care products, where it aids in solubilizing oils and dirt for easier removal. Additionally, it finds use in the synthesis of specialized polymers and as a solvent or co-solvent in chemical reactions, particularly those requiring a hydrophilic environment. Its compatibility with aqueous systems also makes it suitable for use in pharmaceuticals and biotechnology applications, such as in the formulation of drug delivery systems or as a component in cell culture media.