Polyvinylpyrrolidone, average Mw~55000 is a multifunctional synthetic polymer with an average molecular weight of 55000 Da. Polyvinylpyrrolidone, average Mw~55000 is widely used to synthesize nanoparticlesPolyvinylpyrrolidone, average Mw~55000 is a versatile excipient for both conventional formulations and novel controlled or targeted delivery systems, serving as a binder, coating agent, suspending agent, pore-former, solubilizer, stabilizer, etc[1][2].