2-(Propargyloxy)ethanol

2-(Propargyloxy)ethanol (CAS 3973-18-0, EC 223-601-1) is a propargyl ether-functional alcohol also known as propynol ethoxylate or 4-oxa-1-hexyn-6-ol. It combines a terminal alkyne group with a hydroxyl-terminated ethylene oxide unit, giving it dual reactivity in both nucleophilic and click-chemistry contexts.

In metalworking and mining applications, the terminal alkyne group adsorbs onto metal surfaces, forming a protective film that interrupts electrochemical corrosion pathways. It also serves as a functional monomer or initiator in controlled polymerization, where the alkyne terminus enables copper-catalyzed azide-alkyne cycloaddition for building block synthesis and polymer chain modification.

2-(Propargyloxy)ethanol is supplied as a neat liquid and is registered under REACH. Procurement teams should confirm purity grade and inhibitor content with the supplier, as alkyne-functional materials may require stabilization during storage and transport. Standard packaging formats apply for laboratory and industrial quantities.