| Formula / Notation | (C2H4O)n |
|---|---|
| CAS Number | 9002-89-5 |
| Molecular Weight | Variable (polymer) |
| Melting Point | 200–230 °C |
| Boiling Point | Decomposes |
| Density | 1.19–1.31 g/cm³ |
| Solubility | Soluble in hot water |
| Appearance | white to cream granules or powder |
| Also Known As | PVOH; PVA; vinol |
| Category | Polymers & Plastics |
What is Polyvinyl alcohol?
Polyvinyl alcohol (PVOH or PVA) is a water-soluble synthetic polymer produced by hydrolysis (saponification) of polyvinyl acetate. It is unusual among polymers in that it is not produced by polymerisation of its monomer (vinyl alcohol is unstable). PVOH is biodegradable and exhibits excellent film-forming, emulsifying, and adhesive properties. The degree of hydrolysis determines its water solubility — fully hydrolysed PVOH requires hot water to dissolve.
Formula & Notation
IUPAC Name: poly(vinyl alcohol)
Other Names / Synonyms: PVOH; PVA; vinol
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 200–230 °C |
| Boiling Point | Decomposes |
| Density | 1.19–1.31 g/cm³ |
| Molecular Weight | Variable (polymer) |
| Solubility | Soluble in hot water |
| Appearance | white to cream granules or powder |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Polyvinyl alcohol (PVOH or PVA) is a water-soluble synthetic polymer produced by hydrolysis (saponification) of polyvinyl acetate. It is unusual among polymers in that it is not produced by polymerisation of its monomer (vinyl alcohol is unstable). PVOH is biodegradable and exhibits excellent film-forming, emulsifying, and adhesive properties. The degree of hydrolysis determines its water solubility — fully hydrolysed PVOH requires hot water to dissolve.
Water-soluble packaging films (laundry pods, detergent capsules). Paper sizing and coating. Adhesives and glues. Textile warp sizing. Emulsion polymerisation stabiliser. Contact lens manufacturing. Surgical sutures (biodegradable).
Non-toxic, biodegradable, and water-soluble. Generally regarded as safe. May cause mild eye and respiratory irritation as fine dust. Consult SDS before industrial processing.
The formula or notation for Polyvinyl alcohol is: (C2H4O)n