乙二醇单丁醚，分子式C₆H₁₄O₂。

无色、具中等程度醚气味的液体。易燃，低毒。溶于约20倍的水，溶于乙醇、乙醚、矿物油等多数有机溶剂。与石油烃具有很高的稀释比。

2-Butoxyethanol is an organic compound with the chemical formula BuOC₂H₄OH (Bu = CH₃CH₂CH₂CH₂). This colorless liquid has a sweet, ether-like odor, as it derives from the family of glycol ethers, and is a butyl ether of ethylene glycol. As a relatively nonvolatile, inexpensive solvent of low toxicity, it is used in many domestic and industrial products because of its properties as a surfactant.