1,1,3,3,5,5,7,7-Octamethyltetrasiloxane
八甲基四硅氧烷
Also known as: Octamethyltetrasiloxane, 1,1,3,3,5,5,7,7-Octamethyltetrasiloxane, Tetrasiloxane, 1,1,3,3,5,5,7,7-octamethyl-, Oxybis[(dimethylsilylene)oxy]bis(dimethylsilane), [[(dimethyl-λ3-silanyl)oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilicon
1,1,3,3,5,5,7,7-Octamethyltetrasiloxane (CAS 1000-05-1) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H26O3Si4 and a molecular weight of 282.632 g/mol. It is also known as Octamethyltetrasiloxane, Tetrasiloxane, 1,1,3,3,5,5,7,7-octamethyl- and Oxybis[(dimethylsilylene)oxy]bis(dimethylsilane). Key properties include a melting point of <0ºC, a boiling point of 205.1±23.0 °C at 760 mmHg, a density of 0.863 and a flash point of 77.8±22.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1000-05-1
- Jingsj CID
- J-1378278-6
- Molecular Formula
- C8H26O3Si4
- Chinese Name
- 八甲基四硅氧烷
- Molecular Weight
- 282.632 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | <0ºC |
|---|---|
| Boiling Point | 205.1±23.0 °C at 760 mmHg |
| Density | 0.863 |
| Flash Point | 77.8±22.6 °C |
| Exact Mass | 282.095886 |
| PSA | 27.69000 |
| LogP | 7.69 |
| Vapor Pressure | 0.4±0.4 mmHg at 25°C |
| Refractive Index | 1.3875 |
| Storage Conditions | 2~8℃ |
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 1,1,3,3,5,5,7,7-Octamethyltetrasiloxane?
The CAS number of 1,1,3,3,5,5,7,7-Octamethyltetrasiloxane is 1000-05-1.
What are the molecular formula and molecular weight of 1,1,3,3,5,5,7,7-Octamethyltetrasiloxane?
1,1,3,3,5,5,7,7-Octamethyltetrasiloxane has molecular formula C8H26O3Si4 and molecular weight 282.632 g/mol.
What are the upstream and downstream products of 1,1,3,3,5,5,7,7-Octamethyltetrasiloxane?
For 1,1,3,3,5,5,7,7-Octamethyltetrasiloxane, Upstream Products: 1,1,3,3-Tetramethyldisiloxane, Octamethylcyclotetrasiloxane, Hexamethylcyclotrisiloxane; Downstream Products: Dimethylsilane, Hexamethylcyclotrisiloxane, 1,1,3,3,5,5-Hexamethyltrisiloxane.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,1,3,3,5,5,7,7-Octamethyltetrasiloxane (CAS 1000-05-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1378278-6 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.