How are sodium-ammonia solutions used in organic chemistry?

Sodium-ammonia solutions are primarily utilized in organic chemistry for their high reducing power, most notably in a process known as Birch reduction.

Beyond this, liquid ammonia serves as a versatile solvent for sodium, enabling various chemical reactions to proceed at ordinary temperatures that would otherwise require the application of heat. Additionally, these solutions are employed to modify the surface of polytetrafluoroethylene (Teflon), effectively blackening the material to prepare it for cementing to other surfaces.1