1,1,3,3,5,5-Hexamethyltrisiloxane
1,1,3,3,5,5-六甲基三硅氧烷
Also known as: 1,1,3,3,5,5-Hexamethyltrisiloxane, Dimethylbis(dimethylsilyloxy)silane, Bis(dimethylsiloxy)dimethylsilane, 2,4,4,6-Tetramethyl-3,5-dioxa-2,4,6-trisilaheptane, EINECS 214-716-8, MFCD00039788, Hexamethyltrisiloxane
1,1,3,3,5,5-Hexamethyltrisiloxane (CAS 1189-93-1) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H20O2Si3 and a molecular weight of 208.478 g/mol. It is also known as Dimethylbis(dimethylsilyloxy)silane, Bis(dimethylsiloxy)dimethylsilane and 2,4,4,6-Tetramethyl-3,5-dioxa-2,4,6-trisilaheptane. Key properties include a melting point of -67°C, a boiling point of 106.3±9.0 °C at 760 mmHg, a density of 0.822 g/mL at 25 °C(lit.) and a flash point of 18.1±18.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1189-93-1
- Jingsj CID
- J-16011-9
- Molecular Formula
- C6H20O2Si3
- Chinese Name
- 1,1,3,3,5,5-六甲基三硅氧烷
- Molecular Weight
- 208.478 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -67°C |
|---|---|
| Boiling Point | 106.3±9.0 °C at 760 mmHg |
| Density | 0.822 g/mL at 25 °C(lit.) |
| Flash Point | 18.1±18.7 °C |
| Exact Mass | 208.077103 |
| PSA | 18.46000 |
| LogP | 5.90 |
| Vapor Pressure | 33.1±0.2 mmHg at 25°C |
| Refractive Index | n20/D 1.383(lit.) |
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-Hexamethyltrisiloxane?
The CAS number of 1,1,3,3,5,5-Hexamethyltrisiloxane is 1189-93-1.
What are the molecular formula and molecular weight of 1,1,3,3,5,5-Hexamethyltrisiloxane?
1,1,3,3,5,5-Hexamethyltrisiloxane has molecular formula C6H20O2Si3 and molecular weight 208.478 g/mol.
What are the upstream and downstream products of 1,1,3,3,5,5-Hexamethyltrisiloxane?
For 1,1,3,3,5,5-Hexamethyltrisiloxane, Upstream Products: 1,1,3,3-Tetramethyldisiloxane, 1,1,3,3,5,5,7,7-Octamethyltetrasiloxane, Dichlorodimethylsilane.
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-Hexamethyltrisiloxane (CAS 1189-93-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16011-9 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.