This product is a water-soluble synthetic polymer compound, a linear homopolymer of N-vinylpyrrolidone, with a molecular formula of (C₆H₉NO)n, where n represents the average number of N-vinylpyrrolidone chains. The most commonly used excipient is povidone K30, with an average viscosity-average molecular weight of 3.8×104; followed by povidone K15, K25, and K90, with average viscosity-average molecular weights of 0.77×104, 2.5×104, and 63×104, respectively.
Product characteristics
This product is a white to milky white amorphous powder, odorless or slightly odorous; tasteless; hygroscopic, soluble in water, ethanol, isopropanol, glycerol or chloroform, insoluble in acetone, ether and hydrocarbon solvents.
●This product can complex with many substances, especially compounds containing active hydrogen atoms or metal carbonyl compounds, to form solid complexes, which cause significant but reversible changes in the properties of the complexes such as solubility, volatility, stability, toxicity and irritation. When used as an excipient, it can be used to develop many dosage forms with new functions or improve the performance of the original dosage form.
●This product is stable under normal conditions and has strong tolerance to heat, acid and alkali.
Product Standards
| DMF file number | 33506 | 33415 | 32698 | 33592 | |
| Shenghui | K15 | K17 | K25 | K30 | K90 |
| Solution appearance (5% aqueous solution) min. | BY₆ | BY₆ | BY₆ | BY₆ | BY₆ |
| Formic acid, % max. | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Peroxide, ppm max | 400 | 400 | 400 | 400 | 400 |
| K value | 12.8-17.3 | 15.3-18.4 | 22.5-27.0 | 27.0-32.0 | 81.0-97.2 |
| Aldehyde, % max. | 500 | 500 | 500 | 500 | 500 |
| Residual monomer, ppm max | 10 | 10 | 10 | 10 | 10 |
Scope of use
1. Pharmaceutical field: used as tablet adhesive, coating material, dissolving agent and solubilizing drug, also used in eye drops, ointments, etc.
2. Cosmetic industry: used for hair spray, mousse film formation, moisturizing, thickening and stabilizing emulsion in skin care products.
3. Food industry: used as beer and juice clarifier, food packaging adhesive and coating material.
4. Other industries: used to improve stability in coatings, as dispersant and thickener in inks, and as surface sizing agent in papermaking industry.
FAQ
Q: What is the quality standard of your vinylpyrrolidone linear homopolymer product?
A: Our vinyl pyrrolidone linear homopolymer strictly complies with relevant international and domestic standards, such as USP (United States Pharmacopoeia), EP (European Pharmacopoeia) and Chinese Pharmacopoeia, to ensure that product purity, molecular weight distribution and other indicators meet the standards.
Q: What are the requirements for transportation and storage?
A: Avoid moisture, exposure and violent collision during transportation. Store in a cool, dry and ventilated warehouse, away from fire and heat sources, and the storage temperature is recommended to be 5-30℃.
Q: How is the supply stability of the product?
A: We have advanced and large-scale production equipment and a mature supply chain system to ensure stable production. At the same time, we have sufficient safety inventory to cope with sudden order needs and ensure timely supply.
Q: Can you provide samples for trial?
A: Yes, we will provide you with an appropriate amount of free samples to facilitate your product testing and evaluation. You only need to bear the shipping cost.
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