High Quality Content by WIKIPEDIA articles! In chemistry a phase transfer catalyst or PTC is a catalyst that facilitates the migration of a reactant from one phase into another phase where reaction occurs. PTC is a special form of heterogeneous catalysis. Ionic reactants are often soluble in an aqueous phase but insoluble in an organic phase in the absence of the phase transfer catalyst. Phase transfer catalysis refers to the acceleration of the reaction upon the addition the phase transfer catalyst.

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