1,5-Pentanedithiol
1,5-Pentanedithiol (CAS: 928-98-3) is an organosulfur compound with the linear formula HS(CH2)5SH and a molecular weight of 136.28 g/mol. This dithiol serves as a valuable building block in organic synthesis and chemical research. Its reactive thiol groups enable diverse chemical transformations, making it useful in the development of polymers, pharmaceuticals, and other complex organic molecules.
- IUPAC
- Pentamethylene dimercaptan
- Synonyms
- Pentamethylene dimercaptan1,1-Pentanediol, 5-mercapto-5-Mercapto-1-pentanethiol

Organic Synthesis Reagent
Utilised as a difunctional reagent in organic chemistry for constructing cyclic and linear sulfur-containing compounds. Its two thiol groups allow for versatile reactions such as nucleophilic additions and cyclizations.
Polymer Chemistry
Can be incorporated into polymer backbones or used as a cross-linking agent to modify polymer properties. The sulfur atoms can impart unique characteristics to the resulting materials.
Pharmaceutical Intermediate
Serves as a precursor or intermediate in the synthesis of various pharmaceutical agents. The dithiol functionality is key for building complex heterocyclic structures relevant to medicinal chemistry.
Material Science
Applied in the development of novel materials where sulfur functionalities are desired, potentially influencing properties like adhesion, conductivity, or optical characteristics.
| Molecular weight | 136.28 |
|---|---|
| Linear formula | HS(CH2)5SH |
| Assay | 96% |
| Boiling point | 107-108 °C/15 mmHg(lit.) |
| Density | 1.016 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.519(lit.) |
| Melting point | −72 °C(lit.) |
| Protective equipment | Eyeshields, Gloves |
|---|---|
| Flash point | 95 °C / 203 °F |
| Transport (UN / ADR) | UN 3334 |
| Water hazard class (WGK, DE) | 3 |
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 1,5-Pentanedithiol used for?
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1,5-Pentanedithiol is primarily used as a building block in organic synthesis, particularly in the creation of sulfur-containing compounds, polymers, and pharmaceutical intermediates.
What are the CAS number and formula for 1,5-Pentanedithiol?
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The CAS number for 1,5-Pentanedithiol is 928-98-3, and its linear formula is HS(CH2)5SH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,5-Pentanedithiol with an assay of 96%. This product is supplied for research and development purposes and TSS does not represent it as USP, BP, EP, or other pharmacopoeia grades.
What are the safety and handling precautions for 1,5-Pentanedithiol?
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1,5-Pentanedithiol is a combustible liquid with a flash point of 95°C (203°F). Appropriate personal protective equipment, including eyeshields and gloves, should be worn. It is classified under WGK Germany 3.
How is 1,5-Pentanedithiol packed and shipped?
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1,5-Pentanedithiol is packed and shipped according to international regulations for hazardous materials (UN 3334). TSS exports globally, adhering to all relevant shipping and customs requirements.
How can I request a quote or sample?
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To request a quote or a sample of 1,5-Pentanedithiol, please contact our sales department via the website or direct email, providing your specific requirements and shipping details.
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