1-(Trimethylsiloxy)cyclopentene
Also known as: (1-Cyclopenten-1-yloxy)trimethylsilane, (1-Cyclopentenyloxy)trimethylsilane, (Cyclopentenyloxy)trimethylsilane, 1-(Trimethylsilyloxy)cyclopentene, 1-Cyclopentenyloxytrimethylsilane, Cyclopentanone enol trimethyl silyl ether, Cyclopentene, 1-[(trimethylsilyl)oxy]-, Silane, (1-cyclopenten-1-yloxy)trimethyl-, MFCD00001395
1-(Trimethylsiloxy)cyclopentene (CAS 19980-43-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H16OSi and a molecular weight of 156.298 g/mol. Key properties include a boiling point of 154.6±8.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 38.3±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 19980-43-9
- Jingsj CID
- J-1523490-9
- Molecular Formula
- C8H16OSi
- Molecular Weight
- 156.298 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 154.6±8.0 °C at 760 mmHg |
|---|---|
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 38.3±0.0 °C |
| Exact Mass | 156.097046 |
| PSA | 9.23000 |
| LogP | 3.30 |
| Vapor Pressure | 4.0±0.3 mmHg at 25°C |
| Refractive Index | 1.445 |
| Storage Conditions | -20℃ |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2931900090 |
|---|---|
| Summary | 2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 1-(Trimethylsiloxy)cyclopentene?
The CAS number of 1-(Trimethylsiloxy)cyclopentene is 19980-43-9.
What are the molecular formula and molecular weight of 1-(Trimethylsiloxy)cyclopentene?
1-(Trimethylsiloxy)cyclopentene has molecular formula C8H16OSi and molecular weight 156.298 g/mol.
Is 1-(Trimethylsiloxy)cyclopentene hazardous?
1-(Trimethylsiloxy)cyclopentene has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 1-(Trimethylsiloxy)cyclopentene?
For 1-(Trimethylsiloxy)cyclopentene, Upstream Products: Chlorotrimethylsilane, Cyclopentanone, 1-Methoxy-1-trimethylsilyloxypropene; Downstream Products: 2-Methylcyclopentanone, 2,2-Dimethylcyclopentanone, 2,2,5-Trimethylcyclopentanone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-(Trimethylsiloxy)cyclopentene (CAS 19980-43-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523490-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.