Used in analytical chemistry as an ion-pairing agent. Applied in ion-selective electrodes to improve sensitivity and selectivity. Employed in phase-transfer catalysis. Used in electrochemical studies and membrane research.

Its main role is to act as a weakly coordinating anion helping stabilize reactive cations and improve ion detection or transfer in chemical and electrochemical systems.

A bulky organic - inorganic salt consisting of a potassium cation and a large weakly coordinating borate anion. It is typically a white crystalline solid and is stable under normal conditions.