Benzeneseleninic acid anhydride
Benzeneseleninic acid anhydride (CAS 17697-12-0) is an organic selenium compound with the linear formula C6H5SeOOSeOC6H5 and a molecular weight of 360.13 g/mol. This chemical serves as a valuable reagent in organic synthesis, particularly noted for its ability to oxidize hydrazines to azo-compounds. Supplied by Tech Serve Solutions, it is a key building block for researchers and chemists.

Oxidation of Hydrazines
Benzeneseleninic acid anhydride is employed as an oxidizing agent to convert hydrazines into azo-compounds. This transformation is crucial in the synthesis of various organic molecules.
Organic Synthesis Building Block
As an organic building block, this compound facilitates the construction of more complex molecular architectures. Its selenium-containing nature offers unique reactivity in synthetic pathways.
Selenium Compound Research
This material is utilised in research settings involving selenium chemistry, contributing to the understanding and development of novel selenium-containing compounds and reactions.
| Molecular weight | 360.13 |
|---|---|
| Linear formula | C6H5SeOOSeOC6H5 |
| Assay | 70% |
| Impurities tested | <30% benzeneseleninic acid |
| Application | Benzeneseleninic acid anhydride was used to oxidize hydrazines to afford azo-compounds1. |
| Melting point | 165-170 °C(lit.) |



Hazard statements
- H301Toxic if swallowed
- H330Fatal if inhaled
- H373May cause damage to organs through prolonged exposure
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P260Do not breathe dust, fume, gas, mist, vapours or spray
- P273Avoid release to the environment
- P284Wear respiratory protection
- P301IF SWALLOWED
- P310Immediately call 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) | 45-61 |
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 Benzeneseleninic acid anhydride used for?
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Benzeneseleninic acid anhydride is used as a reagent in organic synthesis, primarily for the oxidation of hydrazines to produce azo-compounds. It also serves as a building block and a selenium compound in research.
What is the CAS number and formula for Benzeneseleninic acid anhydride?
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The CAS number for Benzeneseleninic acid anhydride is 17697-12-0, and its linear formula is C6H5SeOOSeOC6H5.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Benzeneseleninic acid anhydride with an assay of 70%, containing less than 30% benzeneseleninic acid. This is a technical/research grade material, and TSS does not represent it as USP, BP, or EP.
How should Benzeneseleninic acid anhydride be handled safely?
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Benzeneseleninic acid anhydride is a Danger signal word substance. It is toxic if swallowed and toxic if inhaled. It may cause damage to organs through prolonged or repeated exposure and is very toxic to aquatic life with long-lasting effects. Handle with extreme care using appropriate personal protective equipment, including eyeshields, faceshields, gloves, and a P2 respirator.
Is Benzeneseleninic acid anhydride suitable for export?
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Yes, Tech Serve Solutions, a specialist global supplier and exporter, can ship Benzeneseleninic acid anhydride. Please consult with us for specific export regulations and requirements.
How can I request a sample or quote?
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To request a sample or a quote for Benzeneseleninic acid anhydride, please contact Tech Serve Solutions directly through our website or sales department. Provide your specific requirements, including quantity and intended use.
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