The specific grade product of polyvinylpyrrolidone (PVP), "K25", represents the average degree of polymerization and solution properties. It is polymerized from N-vinylpyrrolidone monomers.
Physical and chemical properties
Solubility: It has excellent water solubility and can quickly dissolve in cold water to form a clear, transparent and stable solution. It also has good solubility in common organic solvents such as ethanol, which makes it flexible in different formulation systems.
Viscosity properties: The "K value" of K25 determines its viscosity performance in solution. The relatively moderate degree of polymerization gives its aqueous solution a medium viscosity, which plays an important role in many application scenarios that require control of fluid fluidity. For example, when it is dissolved in water to form a solution of a certain concentration, the solution will not be too thin to lose the ability to disperse and stabilize other ingredients, nor will it be too viscous to affect processing and use.
Chemical stability: It can remain stable within a wide pH range (usually pH 3-11) and is not prone to chemical reactions such as hydrolysis and oxidation. This allows it to be used with a variety of acidic, alkaline or neutral substances without affecting its own performance or adversely reacting with other ingredients due to changes in the chemical environment.
How do you ensure the quality stability of your Povidone K 25?
We use advanced and stable solution polymerization technology, and the production process strictly follows the ISO 9001 quality system standard. From the procurement and screening of raw materials N-vinyl pyrrolidone, to the precise control of parameters such as temperature, pressure, and initiator dosage in the reaction, to the multi-step testing process of the finished product, including content determination, impurity detection, microbial limit inspection, etc., to ensure that the quality of each batch of products is stable and uniform, and a detailed quality inspection report will be provided with the goods.
Compared with other manufacturers, where is the price advantage?
We have a large-scale production base. By optimizing supply chain management and cooperating directly with high-quality raw material suppliers, the cost of raw material procurement has been reduced. At the same time, we continue to improve production processes, improve production efficiency, and reduce energy consumption and losses. In summary, our K 25 price is 10% - 15% lower than similar products on the market on average, but the product quality is in full compliance with or even higher than industry standards.
What is the delivery cycle and minimum order quantity?
For regular orders, our delivery cycle is 3-5 working days; if it is a customized or large order, we will negotiate with you according to the actual situation, generally not more than 10 working days. The minimum order quantity is very flexible. The first cooperation supports small batch trial orders. In subsequent cooperation, as the purchase volume increases, we will also provide more discounts and rebate policies.
What technical support does Povidone K 25 have in different application scenarios?
We are equipped with a professional technical team to provide full-range technical support for different application fields such as medicine, cosmetics, and food. For example, in the development of pharmaceutical preparations, we assist in optimizing the formula and solving technical problems such as adhesion, solubilization, and sustained release; in the application of cosmetics, we provide suggestions and solutions on product viscosity adjustment and film-forming performance improvement. As long as you have a need, you can contact our technicians at any time, and we will respond within 24 hours.
What should I pay attention to in the storage and transportation of the product?
During transportation, we use moisture-proof and sealed packaging to ensure that the product is not damp or contaminated. For storage, it is recommended to store the product in a cool, dry, ventilated warehouse with a temperature of 0 - 30°C and a relative humidity of no more than 65%. Under such storage conditions, the product shelf life is 3 years. We will also clearly mark storage and transportation precautions on the product packaging.
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