| Section2 = | Section3 = }} 3,3',3-Phosphinidynetris(benzenesulfonic acid) trisodium salt (tppts), is an organic compound that's also known as sodium triphenylphosphine trisulfonate. The compound has the formula P(C6H4SO3Na)3. This white microcrystalline solid is an unusual example of a water-soluble phosphine. Its complex with rhodium is used in the industrial production of butyraldehyde. Synthesis Tppts is synthesized by sulfonating the three phenyl groups of triphenylphosphine. The sulfona… (More on Tppts)