Tetraphenylborate is an organoboron anion consisting of a central boron atom with four phenyl groups. It is a colorless anion that forms water-insoluble salts with a variety of cations. It was considered as a precipitant for caesium-137 ions in the context of radioactive waste cleanup.
Salts of tetraphenylborate have been used as uncouplers of oxidative phosphorylation.
Oxidation of tetraphenylborate gives biphenyl and .
See also Sodium tetraphenylborate Potassium tetraphenylborate Triphenylborane BARF and other fluorinated derivatives are used as non-coordinating anions
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