S-sec-Butyl chlorothioformate
S-sec-Butyl chlorothioformate (CAS 52805-29-5) is a thioester with the linear formula CH3CH2CH(CH3)SCOCl and a molecular weight of 152.64 g/mol. This organic compound serves as a valuable building block in chemical synthesis, particularly for introducing the sec-butylthioformyl group into various molecules. Its applications span research and development within organic chemistry, facilitating the creation of novel compounds.

Organic Synthesis Intermediate
Utilised as a reactive intermediate for the synthesis of complex organic molecules. It enables the introduction of the sec-butylthioformyl moiety, which can be a key structural feature in target compounds.
Thiol Ester Chemistry
Serves as a reagent in reactions involving thiol esters, contributing to the formation of new sulfur-containing compounds. This is important in areas such as materials science and medicinal chemistry research.
Building Block for Heterocycles
Can be employed in the construction of heterocyclic ring systems, where the sulfur atom and the reactive chlorothioformate group play crucial roles in cyclisation reactions.
| Molecular weight | 152.64 |
|---|---|
| Linear formula | CH3CH2CH(CH3)SCOCl |
| Assay | 96% |
| Density | 1.1070 g/mL at 25 °C |
| Refractive index | n20/D 1.4773 |



Hazard statements
- H226Flammable liquid and vapour
- H302Harmful if swallowed
- 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 | 51 °C / 123.8 °F |
| Transport (UN / ADR) | UN 2920 3(8) / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 10-22-34 |
| 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 S-sec-Butyl chlorothioformate used for?
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S-sec-Butyl chlorothioformate is primarily used as a building block in organic synthesis for introducing the sec-butylthioformyl group into molecules and in the study of thiol ester chemistry.
What is the CAS number and formula for S-sec-Butyl chlorothioformate?
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The CAS number is 52805-29-5, and its linear formula is CH3CH2CH(CH3)SCOCl.
What grade and purity does Tech Serve Solutions supply for S-sec-Butyl chlorothioformate?
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Tech Serve Solutions supplies S-sec-Butyl chlorothioformate with an assay of 96%. This product is suitable for research and chemical synthesis applications and is not represented as USP, BP, or EP grade.
How should S-sec-Butyl chlorothioformate be handled safely?
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S-sec-Butyl chlorothioformate is a Danger hazard. It is flammable (H226), harmful if swallowed (H302), and causes severe skin burns and eye damage (H314). Appropriate personal protective equipment, including gloves, goggles, and respiratory protection (type ABEK respirator filter recommended), must be worn. Handle in a well-ventilated area and avoid contact with skin, eyes, and clothing.
How is S-sec-Butyl chlorothioformate packed and exported?
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S-sec-Butyl chlorothioformate is packed and exported in accordance with international regulations for hazardous materials, including UN 2920 classification. Please contact TSS for specific shipping and export details.
How can I request a sample or quote for S-sec-Butyl chlorothioformate?
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To request a sample or a quotation for S-sec-Butyl chlorothioformate, please use the contact form on our website or email our sales department directly.
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