Trimethoxysilane
Also known as: Trimethoxysilane, Silane, trimethoxy-, HSi(OCH3)3, MFCD00008340, Trimethoxysilyl hydride
Trimethoxysilane (CAS 2487-90-3) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C3H10O3Si and a molecular weight of 122.195 g/mol. Key properties include a melting point of −115 °C(lit.), a boiling point of 81.0±0.0 °C at 760 mmHg, a density of 0.96 g/mL at 25 °C(lit.) and a flash point of -20.7±18.7 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H319 — Causes serious eye irritation and H330 — Fatal if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2487-90-3
- Jingsj CID
- J-47491-9
- Molecular Formula
- C3H10O3Si
- Molecular Weight
- 122.195 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −115 °C(lit.) |
|---|---|
| Boiling Point | 81.0±0.0 °C at 760 mmHg |
| Density | 0.96 g/mL at 25 °C(lit.) |
| Flash Point | -20.7±18.7 °C |
| Exact Mass | 122.039917 |
| PSA | 27.69000 |
| LogP | 3.11 |
| Additional Property | >1 (vs air) |
| Vapor Pressure | 92.6±0.1 mmHg at 25°C |
| Refractive Index | n20/D 1.358(lit.) |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H319 — Causes serious eye irritation
- H330 — Fatal if inhaled
Customs & Trade Information
| HS Code | 2931900090 |
|---|---|
| Summary | 2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Trimethoxysilane?
The CAS number of Trimethoxysilane is 2487-90-3.
What are the molecular formula and molecular weight of Trimethoxysilane?
Trimethoxysilane has molecular formula C3H10O3Si and molecular weight 122.195 g/mol.
Is Trimethoxysilane hazardous?
Trimethoxysilane has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H319 — Causes serious eye irritation; H330 — Fatal if inhaled.
What are the upstream and downstream products of Trimethoxysilane?
For Trimethoxysilane, Upstream Products: Methanol, Silicon, Trichlorosilane; Downstream Products: Trimethoxy(4-methoxyphenyl)silane, Decyltrimethoxysilane, trimethoxy(2-phenylethyl)silane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Trimethoxysilane (CAS 2487-90-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47491-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.