1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane
Also known as: 3-Octylheptamethyltrisiloxane, Heptamethyloctyltrisiloxane, Methyloctylbis(trimethylsiloxy)silane, Trimethyl-(methyl-octyl-trimethylsilyloxysilyl)oxysilane, Caprylyl methicone, SS3408, Silsoft034, 3-n-Octyl-1,1,1,3,5,5,5-heptamethyltrisiloxane, 1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane
1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane (CAS 17955-88-3) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C15H38O2Si3 and a molecular weight of 334.717 g/mol. Key properties include a melting point of -62ºC, a boiling point of 308.6±25.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 124.9±23.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 17955-88-3
- Jingsj CID
- J-1028969-7
- Molecular Formula
- C15H38O2Si3
- Molecular Weight
- 334.717 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -62ºC |
|---|---|
| Boiling Point | 308.6±25.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 124.9±23.6 °C |
| Exact Mass | 334.217957 |
| PSA | 18.46000 |
| LogP | 8.46 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.425 |
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 1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane?
The CAS number of 1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane is 17955-88-3.
What are the molecular formula and molecular weight of 1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane?
1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane has molecular formula C15H38O2Si3 and molecular weight 334.717 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. "1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane (CAS 17955-88-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1028969-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.