Polyvinylpyrrolidone (PVP), a versatile non-ionic polymer with CAS 9003-39-8, is available in various grades denoted by the 'K' value, which corresponds to its molecular weight and viscosity. Among the most commonly discussed are PVP K30 and PVP K90. Understanding the differences between these grades is essential for formulators across pharmaceutical, cosmetic, and industrial sectors to make informed purchasing decisions. As a leading PVP manufacturer and supplier in China, we aim to clarify these distinctions to help you buy the most appropriate grade.

The 'K' value in PVP refers to the Fikentscher K-value, a measure related to the polymer's molecular weight and solution viscosity. Generally, a higher K value indicates a higher molecular weight and, consequently, higher solution viscosity. This fundamental difference dictates their primary applications.

PVP K30 typically has a medium molecular weight, generally falling in the range of 45,000 to 58,000. This makes it an excellent choice for applications where a moderate viscosity and strong binding, film-forming, or dispersing properties are required. In the pharmaceutical industry, PVP K30 is widely used as a binder for tablets, granules, and capsules, ensuring tablet integrity. It also serves as a stabilizer for suspensions and a solubilizing agent for certain APIs. For cosmetic applications, PVP K30 is ideal for hair styling products like sprays and gels where balanced hold and viscosity are needed. If you are looking to buy PVP K30 for these purposes, sourcing it from a reputable China manufacturer ensures consistent performance and quality.

PVP K90, on the other hand, represents a high molecular weight grade, often with a K-value around 90 and molecular weights extending significantly higher. This translates to a much higher solution viscosity compared to K30. Its exceptional binding strength and ability to form robust films make it highly effective in applications requiring significant thickening or stabilization. In pharmaceuticals, it's used as a highly effective binder and stabilizer for oral and topical suspensions. In cosmetics, PVP K90 is the preferred choice for products demanding high viscosity, such as thick hair gels or creams. For formulators needing these properties, purchasing PVP K90 from a trusted China supplier is key.

In summary, the choice between PVP K30 and PVP K90 largely depends on the desired viscosity and specific functional requirements of your formulation. PVP K30 offers versatility for medium viscosity needs, while PVP K90 excels in high viscosity applications. As a dedicated PVP supplier in China, we offer both grades, along with others, to meet your diverse needs. We encourage you to contact us to inquire about purchasing high-quality PVP K30 or PVP K90 and to secure a reliable supply chain for your manufacturing needs.