(TEA) An agent that blocks activity of ION CHANNELS sensitive to POTASSIUM (K+) (potassium channels; see ION CHANNEL). It was once thought to have particular effects on the AUTONOMIC NERVOUS SYSTEM, but it transpires that this is so only because the...

Tetraethylammonium (TEA) is a quaternary ammonium cation consisting of four ethyl groups attached to a central nitrogen atom. Like other members of its class, it can be used to alter a compound's solubility by displacing hard acids with this...