Diphenyl diselenide
Diphenyl diselenide (CAS 1666-13-3), also known as Phenyl diselenide, is an organoselenium compound with the linear formula C₆H₅SeSeC₆H₅ and a molecular weight of 312.13 g/mol. It serves as a valuable building block in organic synthesis, particularly for introducing selenium into organic molecules. Its applications are primarily within chemical research and development for the creation of novel compounds.
- IUPAC
- Phenyl diselenide
- Synonyms
- Phenyl diselenide

Organic Synthesis Reagent
Diphenyl diselenide is utilized as a key reagent in various organic transformations. It is instrumental in the synthesis of complex organoselenium compounds, which can exhibit unique chemical and biological properties.
Precursor for Organoselenium Chemistry
This compound acts as a versatile precursor for generating other selenium-containing organic molecules. Its reactions can lead to the formation of diverse selenides, diselenides, and selenols with potential applications in materials science and medicinal chemistry.
Research and Development
Primarily employed in academic and industrial research laboratories, Diphenyl diselenide facilitates studies in organometallic chemistry and the development of new synthetic methodologies involving selenium.
| Molecular weight | 312.13 |
|---|---|
| Linear formula | C6H5SeSeC6H5 |
| Assay | ≥97.0% (GC) |
| Grade | purum60-63 °C |
| Melting point | 59-61 °C(lit.)60-63 °C |



Hazard statements
- H301Toxic if swallowed
- H331Toxic if inhaled
- H373May cause damage to organs through prolonged exposure
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P301IF SWALLOWED
- P311Call a POISON CENTER or doctor
- P501Dispose of contents and container per local regulations
| Protective equipment | Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3283 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T,N |
| Risk statements (R) | 23/25-33-50/53 |
| Safety statements (S) | 20/21-28-45-60-61 |
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 Diphenyl diselenide used for?
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Diphenyl diselenide (CAS 1666-13-3) is primarily used as a building block in organic synthesis and as a precursor for creating other organoselenium compounds in research and development settings.
What are the CAS number and formula for Diphenyl diselenide?
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The CAS number for Diphenyl diselenide is 1666-13-3, and its linear formula is C₆H₅SeSeC₆H₅.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diphenyl diselenide with a purity of ≥97.0% (GC) and a grade of purum, with a melting point range of 60-63 °C.
How should Diphenyl diselenide be handled safely?
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Diphenyl diselenide is a toxic substance (H301, H331) and harmful to aquatic life with long-lasting effects (H410). Handle with extreme care in a well-ventilated area, wearing appropriate personal protective equipment including eyeshields, faceshields, gloves, and a P2 respirator. Refer to the Safety Data Sheet for detailed handling procedures.
Is Diphenyl diselenide shipped internationally?
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Yes, Tech Serve Solutions is a global supplier and exporter of chemicals, including Diphenyl diselenide, adhering to all relevant shipping regulations.
How can I request a quote or sample of Diphenyl diselenide?
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To request a quote or a sample of Diphenyl diselenide, please contact the Tech Serve Solutions sales team through our website or by phone.
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