Methoxycarbonylsulfenyl chloride
Methoxycarbonylsulfenyl chloride (CAS: 26555-40-8), with the linear formula CH₃OCOSCl and a molecular weight of 126.56 g/mol, is a key organic building block. This sulfur compound, classified as a sulfenyl halide, is utilised in chemical synthesis. Its chemical properties make it a valuable reagent for introducing specific functional groups in organic chemistry research and development, supplied by TSS with an assay of 97%.
- IUPAC
- S-Chloro O-methyl thiocarbonate

Organic Synthesis Reagent
Methoxycarbonylsulfenyl chloride serves as a versatile reagent in organic synthesis, facilitating the introduction of specific sulfur-containing moieties. Its reactivity is leveraged in the preparation of more complex organic molecules and intermediates.
Building Block for Complex Molecules
As a fundamental building block, this compound is employed in multi-step syntheses within academic and industrial research settings. It enables chemists to construct targeted molecular architectures efficiently.
Pharmaceutical Intermediate Synthesis
The compound's structure lends itself to applications in the synthesis of pharmaceutical intermediates. Researchers may utilise it in routes leading to novel drug candidates or established active pharmaceutical ingredients.
| Molecular weight | 126.56 |
|---|---|
| Linear formula | CH3OCOSCl |
| Assay | 97% |
| Boiling point | 133-134 °C(lit.) |
| Density | 1.399 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.481(lit.) |
| Storage temperature | 2-8°C |


Hazard statements
- H226Flammable liquid and vapour
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 54 °C / 129.2 °F |
| Transport (UN / ADR) | UN 2920 3(8) / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 10-34 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Methoxycarbonylsulfenyl chloride used for?
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Methoxycarbonylsulfenyl chloride is primarily used as a reagent and building block in organic synthesis, particularly for introducing sulfur-containing functional groups in the preparation of complex organic molecules and pharmaceutical intermediates.
What is the CAS number and formula for Methoxycarbonylsulfenyl chloride?
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The CAS number for Methoxycarbonylsulfenyl chloride is 26555-40-8, and its linear formula is CH₃OCOSCl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Methoxycarbonylsulfenyl chloride with an assay of 97%. TSS does not represent this product as USP, BP, or EP grade.
What are the safety considerations for handling Methoxycarbonylsulfenyl chloride?
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Methoxycarbonylsulfenyl chloride is classified as Danger (GHS02, GHS05), with hazards H226 (Flammable liquid and vapour) and H314 (Causes severe skin burns and eye damage). Handling requires appropriate personal protective equipment, including faceshields, full-face respirators, gloves, and goggles. Ensure adequate ventilation and avoid ignition sources.
How is Methoxycarbonylsulfenyl chloride packed and shipped?
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Methoxycarbonylsulfenyl chloride is shipped according to UN 2920, Hazard Class 3 (8), Packing Group II regulations. Storage is recommended at 2-8°C.
How can I request a quote or sample for Methoxycarbonylsulfenyl chloride?
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To request a quote or sample of Methoxycarbonylsulfenyl chloride, please contact Tech Serve Solutions directly through our website or sales department.
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