1-Heptanethiol
1-Heptanethiol (CAS: 1639-09-4), with the molecular formula CH3(CH2)6SH and a molar mass of 132.27 g/mol, is a primary alkyl thiol. This organosulfur compound is characterised by its strong, unpleasant odour typical of thiols. It serves as a valuable building block in organic synthesis and finds applications in materials science, particularly in areas involving self-assembly and surface modification.
- IUPAC
- Heptyl mercaptan,Mercaptan C7
- Synonyms
- Heptyl mercaptanMercaptan C7

Organic Synthesis Intermediate
1-Heptanethiol is utilised as a starting material or intermediate in the synthesis of more complex organic molecules. Its thiol group allows for various chemical transformations, including nucleophilic substitution and oxidation reactions.
Materials Science and Surface Chemistry
This thiol is employed in the development of self-assembled monolayers (SAMs) on metal surfaces, especially gold. These SAMs are critical for tailoring surface properties in microelectronics and nanotechnology.
Chemical Reagent
As a mercaptan, 1-Heptanethiol can be used in research laboratories for studies involving sulfur chemistry or as a modifying agent in polymer synthesis.
| Molecular weight | 132.27 |
|---|---|
| Linear formula | CH3(CH2)6SH |
| Assay | ≥98.0% (GC) |
| Grade | purum |
| Boiling point | 173-176 °C/765 mmHg(lit.) |
| Density | 0.844 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.4520(lit.)n20/D 1.452 |

Hazard statements
- H226Flammable liquid and vapour
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 41 °C / 105.8 °F |
| Transport (UN / ADR) | UN 3336 3/PG 3 |
| Water hazard class (WGK, DE) | 3 |
| Risk statements (R) | 10 |
| Safety statements (S) | 23 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Fema Number | 4259 |
|---|
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-Heptanethiol used for?
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1-Heptanethiol is primarily used as a building block in organic synthesis and in materials science for creating self-assembled monolayers on surfaces, particularly for applications in microelectronics and nanotechnology.
What is the CAS number and chemical formula for 1-Heptanethiol?
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The CAS number for 1-Heptanethiol is 1639-09-4, and its chemical formula is CH3(CH2)6SH.
What grade and purity does Tech Serve Solutions supply for 1-Heptanethiol?
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Tech Serve Solutions supplies 1-Heptanethiol with a purity of ≥98.0% (GC), conforming to the purum grade. We do not represent this product as USP, BP, or EP grade unless explicitly stated.
How should 1-Heptanethiol be handled safely?
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1-Heptanethiol is a flammable liquid and vapour (H226). Handle with appropriate personal protective equipment, including eyeshields and gloves, and ensure adequate ventilation. Refer to the Safety Data Sheet for comprehensive handling and safety information.
Is 1-Heptanethiol a controlled substance?
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The provided data does not indicate that 1-Heptanethiol is a controlled substance.
How is 1-Heptanethiol typically packed and exported?
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Tech Serve Solutions exports fine chemicals globally, ensuring appropriate packaging that complies with international shipping regulations for hazardous materials.
How can I request a quote or sample for 1-Heptanethiol?
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To request a quote or sample for 1-Heptanethiol, please contact our sales department through the website or by phone.
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