In the realm of specialty chemicals, Polyvinylpyrrolidone (PVP), also known as povidone (CAS 9003-39-8), is celebrated for its remarkable versatility and wide-ranging applications. However, a common point of inquiry for purchasers and formulators revolves around selecting the appropriate K-value, such as PVP K30 versus PVP K90. The K-value is a critical indicator of the polymer's molecular weight and, consequently, its viscosity in solution. Understanding this distinction is fundamental to optimizing product performance in pharmaceutical, cosmetic, and industrial formulations. As a leading provider, we aim to guide you in selecting the right PVP grade from our extensive offerings as a dedicated PVP K30 supplier and PVP K90 manufacturer.

The K-value of PVP, as defined by the Fikentscher equation, is directly proportional to its molecular weight. Higher K-values correspond to higher molecular weights and thus, higher solution viscosities. This difference in viscosity dictates how each grade performs in specific applications.

PVP K30: The Balanced Performer

PVP K30 typically has a weight-average molecular weight ranging from 40,000 to 70,000 g/mol. In solution, it exhibits a moderate viscosity, making it highly adaptable. In the pharmaceutical industry, PVP K30 is a go-to excipient for tablet binding due to its excellent flow properties and granule formation. It also serves as an effective solubilizing agent for drugs with poor water solubility and a stabilizer in liquid preparations. For cosmetic applications, it's ideal for hairsprays and styling gels requiring good hold without excessive stiffness, and as a thickener in lotions. If you're looking to buy Polyvinylpyrrolidone K30 powder, prioritize suppliers that can guarantee consistent viscosity and purity.

PVP K90: For Demanding Applications

PVP K90 possesses a significantly higher molecular weight, typically between 1,000,000 to 1,500,000 g/mol. This results in a much higher solution viscosity. The enhanced molecular size and entanglement of PVP K90 make it superior for applications requiring stronger film formation, better adhesion, and increased thickening power. In hair care, it provides superior style retention and volume. In pharmaceuticals, its higher viscosity can be advantageous in certain controlled-release formulations or as a potent stabilizer for sensitive drug products. Sourcing PVP K90 powder from a reputable PVP manufacturer in China ensures you receive a product capable of meeting these demanding requirements.

Choosing the Right Grade: Application-Specific Needs

The choice between PVP K30 and K90 primarily depends on the desired final product characteristics and the manufacturing process. For general-purpose tablet binding and moderate film-forming, K30 is often sufficient and more cost-effective. For applications demanding stronger hold, enhanced viscosity, or superior film properties, K90 is the preferred choice. Industrial applications also vary; for instance, as a dispersant in coatings, a moderate viscosity might be ideal, whereas in certain adhesive formulations, higher viscosity could be beneficial. When you buy Polyvinylpyrrolidone, always consult with your PVP supplier regarding the specific K-value that best suits your technical requirements.

Reliable Sourcing from China

As a leading PVP supplier in China, we understand the nuances of these different grades. We offer both PVP K30 and PVP K90 in high-purity, consistent quality, ensuring they meet your exact specifications. Our manufacturing processes adhere to strict quality control, and we are committed to providing reliable supply and competitive pricing. Whether you need bulk Polyvinylpyrrolidone powder for large-scale production or specific grades for niche applications, our expertise and product range are designed to meet your needs.

In conclusion, the distinction between PVP K30 and K90 lies primarily in their molecular weight and resulting viscosity. By understanding these differences and consulting with a knowledgeable PVP K30 supplier or PVP K90 manufacturer, you can confidently select the optimal grade to enhance your product formulations. Contact us today to explore our comprehensive range of PVP products and discover the quality and reliability we offer.