Biphenyl-4-thiol
Biphenyl-4-thiol (CAS: 19813-90-2, C12H10S) is a high-purity organic compound with a molecular weight of 186.27 g/mol. This thiol is instrumental in materials science, specifically for fabricating dense, close-packed monolayers in molecular junctions and serving as a negative resist material in nanolithography. Its distinct chemical properties make it a valuable reagent for advanced electronic and surface modification applications.
- IUPAC
- 1,1′-Biphenyl-4-thiol,4-Biphenylylthiol,4-Mercaptobiphenyl,4-Phenylbenzenethiol
- Synonyms
- 4-Biphenylylthiol4-Mercaptobiphenyl4-Phenylbenzenethiol

Monolayer Formation
Biphenyl-4-thiol is utilised to create highly ordered, close-packed monolayers on various substrates. This is crucial for fabricating precise molecular junctions in advanced electronic devices.
Nanolithography
The compound functions as a negative resist material in nanolithography processes. This enables the precise patterning of nanoscale features required for microelectronics.
Surface Functionalisation
As a thiol, it readily chemisorbs onto metal surfaces, allowing for controlled surface functionalisation and the tailoring of surface properties for specific scientific and industrial needs.
| Molecular weight | 186.27 |
|---|---|
| Empirical formula | C12H10S |
| Assay | 97% |
| Storage temperature | 2-8°C |
| Application | This material is used to create close-packed monolayers in large-area molecular junctions.† It also finds use as a negative resist material for nanolithography.† |
| Melting point | 108-112 °C |


Hazard statements
- H302Harmful if swallowed
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P501Dispose of contents and container per local regulations
| Transport (UN / ADR) | UN 3077 9 / PGIII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn,N |
| Risk statements (R) | 22-50 |
| Safety statements (S) | 61 |
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 Biphenyl-4-thiol used for?
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Biphenyl-4-thiol (CAS: 19813-90-2) is used for creating close-packed monolayers in molecular junctions and as a negative resist material for nanolithography.
What are the CAS number and chemical formula for Biphenyl-4-thiol?
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The CAS number is 19813-90-2 and the empirical formula is C12H10S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Biphenyl-4-thiol with an assay of 97%. This is a research-grade material, and TSS does not represent it as USP, BP, or EP.
How should Biphenyl-4-thiol be handled safely?
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Biphenyl-4-thiol is harmful if swallowed (H302) and very toxic to aquatic life with long-lasting effects (H410). Handle with appropriate personal protective equipment in a well-ventilated area, and avoid release into the environment. Store at 2-8°C.
Is Biphenyl-4-thiol shipped internationally?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Biphenyl-4-thiol.
How can I request a sample or quote for Biphenyl-4-thiol?
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Please contact our sales team or use the online enquiry form to request a sample or quote for Biphenyl-4-thiol.
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