4-mercaptobutyric acid
4-Mercaptobutyric acid (CAS: 13095-73-3), with the molecular formula C4H8O2S and a molecular weight of 120.17 g/mol, is an organic sulfur compound. It functions as a valuable building block in chemical synthesis. This acyclic compound features both a carboxylic acid and a thiol functional group, making it versatile for various organic transformations and the creation of more complex molecules. It is commonly employed in research and development settings.

Organic Synthesis Intermediate
4-Mercaptobutyric acid serves as a key intermediate in the synthesis of diverse organic compounds. Its dual functionality allows for selective reactions at either the thiol or carboxylic acid group, facilitating the construction of thioethers, esters, and amides.
Material Science Research
This compound can be utilised in material science for modifying surfaces or creating polymers with specific properties due to the presence of the thiol group, which can bind to metal surfaces or participate in polymerisation reactions.
Pharmaceutical Intermediate Development
As a building block, 4-mercaptobutyric acid is explored in the development pathways of potential pharmaceutical agents, contributing to the synthesis of molecules with therapeutic interest.
| Molecular weight | 120.17 |
|---|---|
| Empirical formula | C4H8O2S |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/38 |
| 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 4-Mercaptobutyric acid used for?
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4-Mercaptobutyric acid is primarily used as an intermediate in organic synthesis, a building block in chemical research, and in material science applications. Its dual functional groups make it versatile for creating more complex molecules.
What are the CAS number and formula for 4-Mercaptobutyric acid?
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The CAS number for 4-Mercaptobutyric acid is 13095-73-3, and its empirical formula is C4H8O2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Mercaptobutyric acid typically as a research or technical grade chemical. We do not represent this product as USP, BP, or EP grade.
What are the safety and handling considerations for 4-Mercaptobutyric acid?
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4-Mercaptobutyric acid is classified as a warning substance, causing skin irritation (H315) and serious eye irritation (H319). Handle with appropriate personal protective equipment, including gloves and eye protection, and ensure good ventilation. In case of eye contact, rinse cautiously with water for several minutes.
How is 4-Mercaptobutyric acid packed, shipped, and exported?
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4-Mercaptobutyric acid is carefully packaged according to industry standards to ensure safe transit and is available for global export by Tech Serve Solutions.
How can I request a quote or sample of 4-Mercaptobutyric acid?
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To request a quote or a sample of 4-Mercaptobutyric acid, please contact our sales team through the website or direct email, providing your specific requirements.
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