3-(Acetylthio)propionic acid
3-(Acetylthio)propionic acid (CAS: 41345-70-4), a sulfur-containing organic compound with the formula C5H8O3S, has a molecular weight of 148.18 g/mol. This thiol ester is primarily utilised as a building block in chemical synthesis. Its structure suggests potential applications in areas such as enzyme inhibition due to its protected thiol group, making it a valuable reagent in research and development settings for organic chemistry and related fields.
- IUPAC
- S-Acetyl-3-mercaptopropionic acid

Organic Synthesis Intermediate
Serves as a versatile building block in the synthesis of more complex organic molecules. Its functional groups allow for various chemical transformations.
Enzyme Inhibition Studies
Potentially used as an enzyme inhibitor, particularly where a protected thiol group is required. Its application is noted in research concerning enzyme mechanisms and modulation.
Thiol Chemistry Research
A useful reagent for exploring reactions involving thiol esters and sulfur-containing compounds. It provides a stable, acetyl-protected thiol precursor.
| Molecular weight | 148.18 |
|---|---|
| Empirical formula | C5H8O3S |
| Assay | 96% |
| Application | Protected 3-mercaptopropionic acid potentially used as enzyme inhibitor.1,2 |
| Melting point | 48-52 °C |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Flash point | >110 °C / >230 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26 |
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 3-(Acetylthio)propionic acid used for?
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3-(Acetylthio)propionic acid is used as a building block in organic synthesis and potentially as an enzyme inhibitor in research settings. It is a valuable reagent in thiol chemistry.
What are the CAS number and chemical formula for 3-(Acetylthio)propionic acid?
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The CAS number is 41345-70-4, and the chemical formula is C5H8O3S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-(Acetylthio)propionic acid with a minimum assay of 96%. This product is intended for research and laboratory use and is not supplied as USP, EP, BP, or any pharmacopoeial grade.
How should 3-(Acetylthio)propionic acid be handled safely?
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Handle with appropriate personal protective equipment including a dust mask (type N95 US), eyeshields, and gloves. Avoid breathing dust. In case of contact with eyes, rinse cautiously with water for several minutes, removing contact lenses if present and easy to do. Seek medical advice if swallowed.
Is 3-(Acetylthio)propionic acid a controlled substance?
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The provided data does not indicate that 3-(Acetylthio)propionic acid is a controlled substance.
How is 3-(Acetylthio)propionic acid packed and shipped?
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Tech Serve Solutions exports chemicals globally, ensuring appropriate packaging for safe transport in compliance with international regulations. Please contact us for specific shipping details.
How can I request a sample or quote for 3-(Acetylthio)propionic acid?
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To request a sample or a quote for 3-(Acetylthio)propionic acid, please use the contact form on our website or email our sales department, providing your specific requirements.
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