Poly vinyl alcohol 24
| 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 |
| Description | Conforms | ||
| Solubility | Conforms | ||
| Identification | Conforms | ||
| pH | 5.0 to 8.0 | ||
| Loss on drying | ≤ | 5.0 | % |
| Residue on ignition | ≤ | 1 | % |
| Viscosity | 45.0 to 55.0 | mp.s | |
| Water insoluble substances | ≤ | 0/1 | % |
| Limit of methanol | ≤ | 1 | % |
| Limit of methyl acetate | ≤ | 1 | % |
| Acid value | ≤ | 3 | |
| Heavy metals | ≤ | 10 | ppm |
| Degree of hydrolysis | 85.0 to 90.0 | % |
Polyvinyl Alcohol 24 (PVA 24) is a water-soluble synthetic polymer widely used in pharmaceuticals, cosmetics, and laboratory applications for its film-forming, stabilizing, and adhesive properties. It is known for its high biocompatibility and chemical stability.
🏭⚗️ Production
Polyvinyl alcohol is produced by the hydrolysis of polyvinyl acetate, yielding a polymer with varying degrees of hydrolysis and molecular weight. PVA 24 indicates a specific viscosity grade suitable for pharmaceutical formulations, coatings, and adhesives. The polymer is purified and dried to obtain a white, free-flowing powder suitable for industrial and laboratory use.
🔬 Properties
PVA 24 appears as a white, odorless powder or granules. It is soluble in water, forming clear, viscous solutions, and insoluble in most organic solvents. It exhibits excellent film-forming ability, adhesion, and chemical resistance. Its viscosity and solubility make it suitable for controlled-release pharmaceutical formulations and cosmetic applications.
🧪 Applications
In pharmaceuticals, PVA 24 is used in tablet coatings, eye drops, and film-forming topical formulations. In cosmetics, it serves as a stabilizer, binder, and thickener in creams, gels, and masks. In laboratory applications, it acts as a protective colloid, stabilizer for suspensions, and in the preparation of hydrogels and membranes. It is also used in adhesives, textile sizing, and paper coatings.
⚠️ Safety
PVA 24 is generally regarded as non-toxic, non-irritant, and safe for topical and oral use in approved concentrations. Handling the powder should be done in a well-ventilated area to avoid dust inhalation. Protective gloves and masks are recommended in industrial or laboratory settings. It should be stored in a cool, dry place, away from strong oxidizers and moisture to maintain its solubility and polymer properties.
