Trimethylsilyl chlorosulfonate
Also known as: Trimethylsilyl chlorosulphate, Trimethylsilyl sulfurochloridate, Chlorosulfonic acid trimethylsilyl ester, Chlorosulfuric acid trimethylsilyl ester, Chloridosulfuric acid trimethylsilyl ester, [chlorosulfonyloxy(dimethyl)silyl]methane, chlorosulfonate de trimethylsilyle, chlorosulfonate die trimethylsilyle, trimethylsilyl chlorosulphate
Trimethylsilyl chlorosulfonate (CAS 4353-77-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C3H9ClO3SSi and a molecular weight of 188.705 g/mol. Key properties include a melting point of -26ºC(lit.), a boiling point of 169.0±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 42.2±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4353-77-9
- Jingsj CID
- J-48131-2
- Molecular Formula
- C3H9ClO3SSi
- Molecular Weight
- 188.705 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -26ºC(lit.) |
|---|---|
| Boiling Point | 169.0±0.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 42.2±0.0 °C |
| Exact Mass | 187.973022 |
| PSA | 51.75000 |
| LogP | 2.02 |
| Appearance | liquid |
| Vapor Pressure | 2.1±0.3 mmHg at 25°C |
| Refractive Index | 1.438 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H314 — Causes severe skin burns and eye damage
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 Trimethylsilyl chlorosulfonate?
The CAS number of Trimethylsilyl chlorosulfonate is 4353-77-9.
What are the molecular formula and molecular weight of Trimethylsilyl chlorosulfonate?
Trimethylsilyl chlorosulfonate has molecular formula C3H9ClO3SSi and molecular weight 188.705 g/mol.
Is Trimethylsilyl chlorosulfonate hazardous?
Trimethylsilyl chlorosulfonate has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H314 — Causes severe skin burns and eye damage.
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 chlorosulfonate (CAS 4353-77-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48131-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.