Certain thermoplastic additives that induce simultaneous good material properties and high nucleation efficacy are provided. Such additives include combinations of a phosphate salt and a dicarboxylate salt. This combination or blend may be provided in various ratios. A method for applying such a combination in a thermoplastic formulation is also disclosed. A thermoplastic formulation, which may or may not include polypropylene, is also disclosed in connection with the combination.