TETRAPHENYL PHOSPHONIUM BROMIDE
Tetraphenylphosphonium bromide is a quaternary phosphonium salt mainly used in pharmaceuticals, as accelarator for fluoroelastomers , adhesion promotor for fluoroelastomers and curative of polyacrylate polymers which extends the shelf life of the compound and decreases the mould fouling.
Tetraphenylphosphonium chloride is the chemical compound with the formula (C₆H₅)₄PCl, abbreviated Ph₄PCl or PPh₄Cl. Tetraphenylphosphonium and especially tetraphenylarsonium salts were formerly of interest in gravimetric analysis of perchlorate and related oxyanions.
Phosphonium iodide is a chemical compound with the formula PH ₄I. It is an example of a salt containing an unsubstituted phosphonium cation. Phosphonium iodide is commonly used as storage for phosphine and as a reagent for substituting phosphorus into organic molecules