1-ethenyl-1,1,3,3,3-pentamethyldisiloxane
Also known as: Vinylpentamethyldisiloxane, Pentamethylvinyldisiloxane, Vinyldimethyl(trimethylsiloxy)silane, Dimethyl(trimethylsilyloxy)vinylsilane, Ethenyl-dimethyl-trimethylsilyloxysilane, 1-vinyl-1,1,3,3,3-pentamethyldisiloxane, Disiloxane, 1-ethenyl-1,1,3,3,3-pentamethyl-, Disiloxane, pentamethylvinyl-, Pentamethyl-vinyl-disiloxan, vinyldimethyisiloxytrimethylsilane
1-ethenyl-1,1,3,3,3-pentamethyldisiloxane (CAS 1438-79-5) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C7H18OSi2 and a molecular weight of 174.388 g/mol. Key properties include a melting point of <0ºC, a boiling point of 105.4±9.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 11.4±19.1 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 1438-79-5
- Jingsj CID
- J-1523844-5
- Molecular Formula
- C7H18OSi2
- Molecular Weight
- 174.388 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | <0ºC |
|---|---|
| Boiling Point | 105.4±9.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 11.4±19.1 °C |
| Exact Mass | 174.089615 |
| PSA | 9.23000 |
| LogP | 3.55 |
| Vapor Pressure | 34.4±0.2 mmHg at 25°C |
| Refractive Index | 1.407 |
| Storage Conditions | 2~8℃，Seal |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 1-ethenyl-1,1,3,3,3-pentamethyldisiloxane?
The CAS number of 1-ethenyl-1,1,3,3,3-pentamethyldisiloxane is 1438-79-5.
What are the molecular formula and molecular weight of 1-ethenyl-1,1,3,3,3-pentamethyldisiloxane?
1-ethenyl-1,1,3,3,3-pentamethyldisiloxane has molecular formula C7H18OSi2 and molecular weight 174.388 g/mol.
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-ethenyl-1,1,3,3,3-pentamethyldisiloxane (CAS 1438-79-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523844-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.