Cellulose acetate
IUPAC: cellulose diacetate; cellulose triacetate
| Formula / Notation | (C6H7O2(OOCCH3)n) |
|---|---|
| CAS Number | 9004-35-7 |
| Molecular Weight | Variable (polymer) |
| Melting Point | 230–300 °C |
| Boiling Point | Decomposes |
| Density | 1.27–1.34 g/cm³ |
| Solubility | Soluble in acetone |
| Appearance | white powder or fibres |
| Also Known As | CA; acetate fibre; cellulose diacetate |
| Category | Polymers & Plastics |
What is Cellulose acetate?
Cellulose acetate is produced by treating cellulose with acetic anhydride to acetylate some or all of the hydroxyl groups. Cellulose diacetate (DS 2.4) is used primarily in textile fibres and cigarette filters, while cellulose triacetate (DS ~3.0) is used in photographic film base and high-performance membranes. It was one of the first semi-synthetic polymers, developed in the early 20th century as a substitute for celluloid.
Formula & Notation
IUPAC Name: cellulose diacetate; cellulose triacetate
Other Names / Synonyms: CA; acetate fibre; cellulose diacetate
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 230–300 °C |
| Boiling Point | Decomposes |
| Density | 1.27–1.34 g/cm³ |
| Molecular Weight | Variable (polymer) |
| Solubility | Soluble in acetone |
| Appearance | white powder or fibres |
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
Cellulose acetate is produced by treating cellulose with acetic anhydride to acetylate some or all of the hydroxyl groups. Cellulose diacetate (DS 2.4) is used primarily in textile fibres and cigarette filters, while cellulose triacetate (DS ~3.0) is used in photographic film base and high-performance membranes. It was one of the first semi-synthetic polymers, developed in the early 20th century as a substitute for celluloid.
Cigarette filters (largest use). Textile fibres (acetate fabrics). Photographic and optical films. Membrane filtration. Spectacle frame material. Lacquers and coatings.
Biodegradable under certain conditions. Burns producing acetic acid vapour. Cigarette filter waste is an environmental concern. Consult SDS before industrial processing.
The formula or notation for Cellulose acetate is: (C6H7O2(OOCCH3)n)