Polyvinylpyrrolidone
[CAS# 9003-39-8]

Identification

• Classification: API >> Blood system medication >> Blood volume expander
• Name: Polyvinylpyrrolidone
• Synonyms: Polyvinyl pyrrolidone; Povidone; PVP
• Molecular Formula: (C₆H₉NO)_n
• Molecular Weight: 360000
• CAS Registry Number: 9003-39-8
• EC Number: 658-049-4
• SMILES: C=CN1CCCC1=O

Properties

• Melting point: 130 º°C (Expl.)
• Solubility: water soluble 100 mg/mL (Expl.)

Safety Data

• Hazard Symbols: GHS05;GHS07;GHS08 Danger
• Risk Statements: H302-H312-H318-H332-H335-H351-H373
• Safety Statements: P203-P260-P261-P264-P264+P265-P270-P271-P280-P301+P317-P302+P352-P304+P340-P305+P354+P338-P317-P318-P319-P321-P330-P362+P364-P403+P233-P405-P501

Discovery and Applications

Polyvinylpyrrolidone (PVP), also known as povidone or polyvidone, is a water-soluble synthetic polymer derived from the monomer N-vinylpyrrolidone. It was first synthesized in the 1930s and gained industrial significance due to its unique combination of properties including water solubility, chemical stability, and biocompatibility. The polymer is produced through free-radical polymerization of N-vinylpyrrolidone, resulting in a linear polymer with repeating units containing the pyrrolidone ring.

PVP exhibits excellent solubility in water and many organic solvents, making it highly versatile in various applications. Its strong ability to form hydrogen bonds with other molecules contributes to its function as a binder, stabilizer, and dispersant. The molecular weight of PVP can be controlled during polymerization, allowing customization of its properties for specific uses.

One of the earliest and most widespread applications of PVP has been in the pharmaceutical industry. It is used as a binder in tablet formulations to hold the ingredients together, enhancing the mechanical strength and uniformity of the tablets. PVP is also employed as a suspending agent and solubilizer in liquid pharmaceuticals to improve the bioavailability of poorly soluble drugs. Its non-toxic and non-irritant nature has made it a preferred excipient in many oral, topical, and injectable drug formulations.

In the medical field, PVP gained further prominence as a component of povidone-iodine, a widely used antiseptic solution. The complex of PVP with iodine provides a controlled release of iodine, which acts as an effective antimicrobial agent while reducing irritation compared to iodine alone. This antiseptic formulation is extensively used for wound disinfection, preoperative skin preparation, and treatment of minor infections.

Outside medicine, PVP is valued in cosmetics and personal care products for its film-forming and stabilizing properties. It is commonly found in hair sprays, gels, and styling products where it helps maintain shape and provide hold. In skincare formulations, PVP acts as a thickener and moisture-retaining agent, enhancing texture and product stability.

Industrial applications of PVP include its use as a dispersant in the production of pigments, inks, and adhesives. In the food industry, it is sometimes used as a stabilizer and clarifying agent for beverages such as beer and wine. PVP’s ability to form complexes with various molecules allows it to stabilize suspensions and prevent aggregation.

In scientific research, PVP serves as a stabilizing agent for nanoparticles and colloidal dispersions. Its biocompatibility and solubility make it a popular choice in the preparation of drug delivery systems and other nanomaterials.

The safety profile of PVP is well-established, with low toxicity and minimal allergic reactions reported. Its biodegradability varies depending on molecular weight and environmental conditions, and research continues to optimize its environmental impact.

In summary, polyvinylpyrrolidone is a synthetic polymer derived from N-vinylpyrrolidone, known for its solubility, biocompatibility, and versatility. It is widely used in pharmaceuticals as a binder and solubilizer, in medicine as an antiseptic component, in cosmetics for styling and skin care, and in various industrial applications as a stabilizer and dispersant. Its combination of properties and safety has made it an indispensable material across multiple sectors.

References

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