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The Influence of the K-Value in Povidone K30
Release Time:
Feb 06,2026
Polyvinylpyrrolidone (PVP) is used in the pharmaceutical industry as a synthetic polymer carrier for dispersing and suspending drugs. It has a wide range of applications, including serving as a binder in tablets and capsules, an film-forming agent in ophthalmic solutions, an auxiliary flavoring agent in liquid formulations and chewable tablets, and a adhesive in transdermal systems.
The molecular formula of Povidone K30 is (C6H9NO)n It appears as a white to slightly grayish-white powder. Polyvinylpyrrolidone preparations are widely used in the pharmaceutical industry because they are soluble in both water and oil-based solvents. The K-value represents the average molecular weight of polyvinylpyrrolidone. Polyvinylpyrrolidones with higher K-values (e.g., K90), due to their larger molecular weights, are generally not administered by injection. A higher molecular weight can impede renal excretion, leading to accumulation within the body. One of the most well-known examples of polyvinylpyrrolidone preparations is povidone-iodine, an important antiseptic agent.
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