Thiophenol
Thiophenol (CAS: 108-98-5; Formula: C6H5SH; Molar Mass: 110.18 g/mol) is an organosulfur compound with a distinct, unpleasant odour. It serves as a valuable building block in organic synthesis and a precursor in the chemical industry. Its reactivity stems from the thiol group, making it useful for creating more complex molecules.
- IUPAC
- Benzenethiol,Phenyl mercaptan
- Synonyms
- BenzenethiolPhenyl mercaptan

Organic Synthesis Intermediate
Thiophenol is a versatile intermediate used in the synthesis of pharmaceuticals, agrochemicals, and specialty polymers. Its thiol functionality allows for various coupling and addition reactions.
Reagent in Organic Chemistry
As a source of the thiophenyl group, it is employed in various named reactions and to introduce sulfur into organic structures. It is particularly useful in the synthesis of thioethers and related sulfur-containing compounds.
Precursor for Specialty Chemicals
It acts as a starting material for the production of dyes, pesticides, and antioxidants. The unique properties conferred by the sulfur atom are critical for these applications.
| Molecular weight | 110.18 |
|---|---|
| Linear formula | C6H5SH |
| Assay | ≥99% |
| Boiling point | 169 °C(lit.) |
| Density | 1.073 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.588(lit.) |
| Solubility | alcohol: very soluble(lit.)benzene: miscible(lit.)carbon disulfide: miscible(lit.)diethyl ether: miscible(lit.)water: insoluble(lit.) |
| Melting point | −15 °C(lit.) |
| Vapour pressure | 1.4 mmHg (20 °C) |
| Vapour density | 3.8 (vs air) |



Hazard statements
- H226Flammable liquid and vapour
- H300Fatal if swallowed
- H318Causes serious eye damage
Precautionary statements
- P260Do not breathe dust, fume, gas, mist, vapours or spray
- P264Wash thoroughly after handling
- P280Wear protective gloves, clothing and eye/face protection
- P284Wear respiratory protection
- P301IF SWALLOWED
- P302IF ON SKIN
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 50 °C / 122 °F |
| Transport (UN / ADR) | UN 2337 3(6.1) / PGI |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T+ |
| Risk statements (R) | 10-24/25-26-41 |
| Safety statements (S) | 23-26-28-36/37/39-45 |
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 Thiophenol primarily used for?
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Thiophenol is primarily used as a building block and intermediate in organic synthesis, particularly for pharmaceuticals, agrochemicals, and specialty chemicals, as well as a reagent in organic chemistry.
What are the CAS number and formula for Thiophenol?
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The CAS number for Thiophenol is 108-98-5, and its chemical formula is C6H5SH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Thiophenol with an assay of ≥99%. We do not represent this product as USP, BP, EP, or other pharmacopoeial grades unless explicitly stated.
How should Thiophenol be handled safely?
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Thiophenol is a highly toxic and corrosive substance. It is flammable and causes severe eye damage. Handle with extreme caution in a well-ventilated area, wearing appropriate personal protective equipment including eyeshields, face shields, and suitable gloves and respiratory protection. Refer to the Safety Data Sheet for detailed handling instructions.
Is Thiophenol a controlled substance?
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The provided data does not indicate that Thiophenol is a controlled substance.
How is Thiophenol packed and shipped?
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Tech Serve Solutions exports Thiophenol globally. Packaging adheres to strict international regulations for hazardous materials. Please contact us for specific shipping and export inquiries.
How can I request a sample or quote for Thiophenol?
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To request a sample or a quote for Thiophenol, please contact our sales department via the website or by telephone.
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