Benzil
Benzil (CAS: 134-81-6), also known as Diphenylethanedione, is an organic compound with the molecular formula C 14 H 10 O 2 and a molecular weight of 210.23 g/mol. This yellow crystalline solid is a valuable building block in organic synthesis, particularly in the preparation of various heterocyclic compounds and as a photoinitiator in polymerisation processes. Benzil finds applications in chemical research and industrial processes.
- IUPAC
- Dibenzoyl,Diphenylethanedione
- Synonyms
- DibenzoylDiphenylethanedione1,2-Diphenylethane-1,2-dione1,2-Dibenzoylethane

Organic Synthesis Intermediate
Benzil serves as a key intermediate in the synthesis of diverse organic molecules. Its diketone structure facilitates reactions leading to heterocyclic compounds like imidazoles and quinoxalines.
Photoinitiator
As a photoinitiator, Benzil absorbs UV light and generates free radicals, initiating polymerisation reactions. This property is utilised in UV-curable coatings, inks, and adhesives.
Research Chemical
In laboratory settings, Benzil is employed in academic and industrial research for exploring new synthetic pathways and developing novel materials.
| Molecular weight | 210.23 |
|---|---|
| Linear formula | C6H5COCOC6H5 |
| Assay | 98% |
| Vapour pressure | 1 mmHg (128.4 °C) |
| Melting point | 94-95 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Flash point | 180 °C / 356 °F |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Gene Information | human ... ACHE(43), BCHE(590), CES1(1066) |
|---|
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 Benzil used for?
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Benzil is primarily used as an intermediate in organic synthesis, particularly for preparing heterocyclic compounds, and as a photoinitiator in polymerisation processes. It is also utilized as a research chemical.
What is the CAS number and formula for Benzil?
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The CAS number for Benzil is 134-81-6, and its linear formula is C 6 H 5 COCOC 6 H 5 .
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Benzil with an assay of 98%. We do not represent this product as USP, BP, or EP grade.
How should Benzil be handled safely?
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Benzil is a Warning substance that causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment, including a dust mask (N95), eyeshields, and gloves, in a well-ventilated area.
How is Benzil packed, shipped, and exported?
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Benzil is carefully packed to ensure integrity during transit and is available for global export by Tech Serve Solutions.
How can I request a sample or quote for Benzil?
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To request a sample or a quotation for Benzil, please contact our sales department via the website or direct enquiry.
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