1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane
Also known as: 1,3-Di-n-octyltetramethyldisiloxane, 1,3-Dioctyltetramethyldisiloxane, 1,3-Di-n-octyl-1,1,3,3-Tetramethyl Disiloxane, Disiloxane, 1,1,3,3-tetramethyl-1,3-dioctyl-
1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane (CAS 18642-94-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C20H46OSi2 and a molecular weight of 358.750 g/mol. Key properties include a boiling point of 345.8±10.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 145.6±19.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 18642-94-9
- Jingsj CID
- J-1523858-1
- Molecular Formula
- C20H46OSi2
- Molecular Weight
- 358.750 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 345.8±10.0 °C at 760 mmHg |
|---|---|
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 145.6±19.4 °C |
| Exact Mass | 358.308716 |
| PSA | 9.23000 |
| LogP | 11.64 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.435 |
| Storage Conditions | 2~8°C |
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 1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane?
The CAS number of 1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane is 18642-94-9.
What are the molecular formula and molecular weight of 1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane?
1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane has molecular formula C20H46OSi2 and molecular weight 358.750 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. "1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane (CAS 18642-94-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523858-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.