Benzoin ethyl ether
Benzoin ethyl ether (CAS 574-09-4) is a chemical compound with the linear formula C 6 H 5 COCH(OC 2 H 5 )C 6 H 5 and a molecular weight of 240.30 g/mol. This organic molecule functions primarily as a photoinitiator in polymerization processes. It is valued for its role in initiating radical polymerization when exposed to UV light, making it a key component in various photopolymerization applications.
- IUPAC
- α-Ethoxy-α-phenylacetophenone,2-Ethoxy-2-phenylacetophenone
- Synonyms
- α-Ethoxy-α-phenylacetophenone2-Ethoxy-2-phenylacetophenone

Photoinitiator in Polymerization
Benzoin ethyl ether serves as an effective photoinitiator, initiating radical polymerization upon UV light exposure. This property is crucial in the development of UV-curable coatings, inks, and adhesives.
Materials Science Applications
Within materials science, this compound contributes to the formulation of polymers and advanced materials through controlled polymerization techniques. Its use enables precise material property tuning.
Polymer Science Research
As a reagent in polymer science, benzoin ethyl ether is employed in research settings to study polymerization mechanisms and develop novel polymeric structures. It facilitates the controlled synthesis of polymers.
| Molecular weight | 240.30 |
|---|---|
| Linear formula | C6H5COCH(OC2H5)C6H5 |
| Assay | 97% |
| Melting point | 59-61 °C(lit.) |


Hazard statements
- H317May cause an allergic skin reaction
- H400Very toxic to aquatic life
Precautionary statements
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi,N |
| Risk statements (R) | 43-50/53 |
| Safety statements (S) | 36/37-60-61 |
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 Benzoin ethyl ether used for?
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Benzoin ethyl ether is primarily used as a photoinitiator in radical polymerization, finding applications in UV-curable coatings, inks, adhesives, and in materials science and polymer research.
What is the CAS number and formula for Benzoin ethyl ether?
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The CAS number for Benzoin ethyl ether is 574-09-4, and its linear formula is C 6 H 5 COCH(OC 2 H 5 )C 6 H 5 .
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Benzoin ethyl ether with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
How should Benzoin ethyl ether be handled safely?
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Benzoin ethyl ether is classified as a warning substance, with hazards including skin sensitisation (H317) and being very toxic to aquatic life (H400). Handling requires a dust mask (type N95), eyeshields, faceshields, and gloves. Ensure adequate ventilation and avoid release to the environment.
How is Benzoin ethyl ether packed and shipped?
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Benzoin ethyl ether is shipped as UN 3077, Class 9, Packing Group III, suitable for transport and export.
How can I request a quote or sample?
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To request a quote or sample of Benzoin ethyl ether, please contact our sales team through the website or by phone.
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