Octadecyltrimethoxysilane
十八烷基三甲氧基硅烷
Also known as: Trimethoxyoctadecylsilane, Trimethoxy(octadecyl)silane, Stearyltrimethoxysilane, n-Octadecyltrimethoxysilane, n-Octadecyl Trimethoxysilane, OctadecyltriMethoxysilane
Octadecyltrimethoxysilane (CAS 3069-42-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C21H46O3Si and a molecular weight of 374.674 g/mol. It is also known as Trimethoxyoctadecylsilane, Trimethoxy(octadecyl)silane and Stearyltrimethoxysilane. Key properties include a melting point of 16-17 °C(lit.), a boiling point of 294.2±8.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 140.0±0.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 3069-42-9
- Jingsj CID
- J-18773-6
- Molecular Formula
- C21H46O3Si
- Chinese Name
- 十八烷基三甲氧基硅烷
- Molecular Weight
- 374.674 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 16-17 °C(lit.) |
|---|---|
| Boiling Point | 294.2±8.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 140.0±0.0 °C |
Frequently Asked Questions
What is the CAS number of Octadecyltrimethoxysilane?
The CAS number of Octadecyltrimethoxysilane is 3069-42-9.
What are the molecular formula and molecular weight of Octadecyltrimethoxysilane?
Octadecyltrimethoxysilane has molecular formula C21H46O3Si and molecular weight 374.674 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Octadecyltrimethoxysilane (CAS 3069-42-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18773-6 (accessed 2026-10-24).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.