Cyclic pentamer of dimethylsiloxane, supplied as a monomer rather than a finished fluid. Undergoes ring-opening polymerization to build linear polydimethylsiloxane chains, making it a starting intermediate for silicone fluid production.
Product Code
ASIL-D5
Decamethylcyclopentasiloxane (D5)
CAS Number
541-02-6
EINECS
208-764-9
Description
Synonyms
Key applications
- Ring-opening polymerization to polydimethylsiloxane
- Intermediate for silicone fluid manufacture
- Siloxane chain-building monomer
Characteristics
| Family | Cyclic Siloxanes |
|---|---|
| Molecular formula | C10H30O5Si5 |
| Molecular weight | 370.77 g/mol |
| Melting point | -38°C |
| Boiling point | 210 °C |
| Density at 25°C | 0.957 g/cm³ |
| Refractive index at 25°C | 1.396 |
| Flash point | 78 °C (closed cup) |
| Appearance | Colorless volatile liquid |