18 CROWN-6-ETHER 17455-13-9

This compound is a cyclic ether that contains a ring of six oxygen atoms bridging two opposite carbon atoms in the ring. It is widely used as a complexing agent in chemistry to bind metal ions and facilitate their transport or separation in various processes. In particular, it is commonly used to complex alkali metal cations, such as potassium and sodium, and to facilitate the transfer of these ions across membranes in biological and synthetic systems.