Trimethylsilyl isocyanate
Also known as: Isocyanatotrimethylsilane, TRIMETHYLSILYL ISOCYANATE, Isocyanato(trimethyl)silane, Silane, isocyanatotrimethyl-, Trimethylsilyl isocyanate, Trimethylsilylisocyanate
Trimethylsilyl isocyanate (CAS 1118-02-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H9NOSi and a molecular weight of 115.206 g/mol. Key properties include a melting point of -49°C, a boiling point of 91.0±0.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 5.7±22.6 °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 H331 — Toxic if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1118-02-1
- Jingsj CID
- J-40980-3
- Molecular Formula
- C4H9NOSi
- Molecular Weight
- 115.206 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -49°C |
|---|---|
| Boiling Point | 91.0±0.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 5.7±22.6 °C |
| Exact Mass | 115.045341 |
| PSA | 29.43000 |
| LogP | 2.16 |
| Vapor Pressure | 62.1±0.1 mmHg at 25°C |
| Refractive Index | 1.410 |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H319 — Causes serious eye irritation
- H331 — Toxic if inhaled
- H334 — May cause allergy or asthma symptoms if inhaled
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of Trimethylsilyl isocyanate?
The CAS number of Trimethylsilyl isocyanate is 1118-02-1.
What are the molecular formula and molecular weight of Trimethylsilyl isocyanate?
Trimethylsilyl isocyanate has molecular formula C4H9NOSi and molecular weight 115.206 g/mol.
Is Trimethylsilyl isocyanate hazardous?
Trimethylsilyl isocyanate has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H319 — Causes serious eye irritation; H331 — Toxic if inhaled.
What are the upstream and downstream products of Trimethylsilyl isocyanate?
For Trimethylsilyl isocyanate, Upstream Products: Chlorotrimethylsilane, Silver cyanate, Sodium cyanate; Downstream Products: 4-ethylbenzamide, 2,6-Difluorobenzoyl isocyanate, 1-Adamantyl isocyanate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Trimethylsilyl isocyanate (CAS 1118-02-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-40980-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.