Diphenyl selenide
Diphenyl selenide (CAS: 1132-39-4) is an organoselenium compound with the molecular formula (C6H5)2Se and a molecular weight of 233.17 g/mol. This chemical is primarily utilised as a reagent in organic synthesis, notably for the anti-selective Michael addition of thiols and related compounds to nitro-olefins. It serves as a valuable building block in chemical synthesis and is classified under selenium compounds.

Anti-Selective Michael Additions
Diphenyl selenide facilitates the anti-selective Michael addition of thiols and their analogues to nitro-olefins. This reaction is a key transformation in the synthesis of various organic molecules.
Organic Synthesis Building Block
As a versatile building block, diphenyl selenide is employed in a range of chemical synthesis pathways. Its utility extends to the creation of more complex organic structures.
Selenium Compound Chemistry
This compound is a significant member of the selenium compounds class, contributing to research and development in organoselenium chemistry.
| Molecular weight | 233.17 |
|---|---|
| Linear formula | (C6H5)2Se |
| Assay | 96% |
| Boiling point | 115-117 °C(lit.) |
| Density | 1.338 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.6465(lit.) |
| Storage temperature | 2-8°C |
| Application | Used for Anti-selective Michael addition of thiols and their analogs to nitro-olefins.1 |



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, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | >110 °C / >230 °F |
| Transport (UN / ADR) | UN 3082 9 / PGIII |
| 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 selenide used for?
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Diphenyl selenide is primarily used for the anti-selective Michael addition of thiols and their analogs to nitro-olefins, and as a building block in chemical synthesis.
What are the CAS number and chemical formula for Diphenyl selenide?
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The CAS number for Diphenyl selenide is 1132-39-4, and its linear formula is (C6H5)2Se.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diphenyl selenide with an assay of 96%. This is a technical/research grade and is not represented as USP, BP, or EP.
How should Diphenyl selenide be handled safely?
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Diphenyl selenide is toxic if swallowed or inhaled and may cause damage to organs through prolonged or repeated exposure. It is also very toxic to aquatic life with long-lasting effects. Always use appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, and handle in a well-ventilated area or fume hood.
Is Diphenyl selenide packed and shipped internationally?
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Yes, Tech Serve Solutions packs and exports chemicals, including Diphenyl selenide, adhering to all relevant transport regulations (UN 3082, Class 9, Packing Group III).
How can I request a sample or quote for Diphenyl selenide?
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To request a sample or quote for Diphenyl selenide, please contact our sales team through the website or via email, providing your specific requirements.
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