359742

Trimethylsilyl chlorosulfonate

99%

• Synonym(s): Chlorosulfonic acid trimethylsilyl ester, Trimethylsiloxysulfonyl chloride, Trimethylsilyl chlorosulfate, Trimethylsilyl chlorosulfonate, [Chlorosulfonyloxy(dimethyl)silyl]methane
• Linear Formula: ClSO₃Si(CH₃)₃
• CAS Number: 4353-77-9
• Molecular Weight: 188.71
• Beilstein/REAXYS Number: 1763675
• EC Number: 224-425-8
• MDL number: MFCD00040471
• UNSPSC Code: 12352100
• PubChem Substance ID: 24862103
• NACRES: NA.22

Properties

• assay: 99%
• form: liquid
• refractive index: n20/D 1.424 (lit.)
• bp: 168-169 °C (lit.); 62-64 °C/10 mmHg (lit.)
• mp: −26 °C (lit.)
• density: 1.225 g/mL at 25 °C (lit.)
• SMILES string: C[Si](C)(C)OS(Cl)(=O)=O
• InChI: 1S/C3H9ClO3SSi/c1-9(2,3)7-8(4,5)6/h1-3H3
• InChI key: QWQONZVLXJGXHV-UHFFFAOYSA-N

Description

General description

Trimethylsilyl chlorosulfonate is commonly employed as sulfonating agent.

Application

Trimethylsilyl chlorosulfonate may be used:

• in the sulfonation of small organic molecules
• in the synthesis of sulfonated polysulfone
• as sulfonating agent in the preparation of nano-structured organic-inorganic membranes for proton exchange membrane fuel cells (PEMFC) based on methacrylate and epoxy polymeric structures
• in the preparation of sulfonated polysulfone (sPS)/titanium dioxide (TiO₂) composite membranes for use in PEMFCs
• in the preparation of iodosobenzene sulfate, required for the synthesis of cyclic sulfates

Safety Information

• pictograms: GHS02,GHS05
• signalword: Danger
• hcodes: H226,H314
• pcodes: P210 - P233 - P240 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 3
• flash_point_f: 107.6 °F - closed cup
• flash_point_c: 42 °C - closed cup
• ppe: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter