Poly vinyl alcohol 20
| Chemical formula | (C2H4O)n |
| Density | 1.3 g/cm3 (20°C) |
| CAS number | 9002-89-5 |
| HS Code | 39053000 |
| Storage | store at +15 to +25 °C |
| SDS | available |
| RTECS | TR8100000 |
| Odour | almost odourless |
| Form | powder |
| Color | white to yellowish |
| Ignition temprature | 450 °C |
| Vapur pressure | low |
Polyvinyl Alcohol 20 (PVA 20) is a synthetic, water-soluble polymer widely used in pharmaceutical and laboratory applications for its excellent film-forming, binding, and stabilizing properties. It appears as a white to off-white granular powder that forms clear, viscous solutions when dissolved in water, making it highly suitable for controlled-release and coating formulations.
🏭⚗️ Production
Polyvinyl alcohol is produced by the controlled hydrolysis of polyvinyl acetate, where acetate groups are replaced by hydroxyl groups under specific temperature and catalytic conditions. The “20” designation typically refers to its viscosity grade, indicating a medium molecular weight suitable for pharmaceutical coatings and laboratory use. The final product is purified and standardized to ensure consistent solubility, film strength, and viscosity.
🔬 Properties
PVA 20 is a white, odorless, and tasteless powder that is soluble in hot water and forms clear, viscous, and stable solutions. It exhibits excellent film-forming, adhesive, and emulsifying properties. The polymer is chemically stable, non-toxic, and compatible with a wide range of pharmaceutical excipients. Its high tensile strength and flexibility make it ideal for use in coating and binding applications.
🧪 Applications
In pharmaceutical formulations, Polyvinyl Alcohol 20 is used as a film-forming agent in tablet coatings, as a binder in granulations, and as a stabilizer in emulsions and suspensions. It also plays an essential role in the preparation of sustained-release matrices and ophthalmic solutions, where clarity and biocompatibility are required. In laboratory settings, PVA 20 is utilized in the preparation of hydrogels, polymer films, and as a support medium in biochemical and analytical studies.
⚠️ Safety
Polyvinyl Alcohol 20 is considered safe and non-toxic for pharmaceutical and laboratory use. However, dust inhalation should be avoided, and handling should be performed with appropriate protective equipment, including gloves, goggles, and lab coats. The material should be stored in tightly closed containers, in a cool, dry, and well-ventilated area, away from strong oxidizers and direct sunlight, to maintain its stability and performance.
