Diethyl 3-bromobenzylphosphonate
Diethyl 3-bromobenzylphosphonate (CAS: 128833-03-4), with the molecular formula C11H16BrO3P and a molecular weight of 307.12 g/mol, is a valuable organic building block. This phosphonate derivative serves as a versatile intermediate in organic synthesis, particularly in the construction of complex molecules. Its chemical structure lends itself to various synthetic transformations, making it a useful reagent in research and development laboratories.
- IUPAC
- Diethyl m-bromobenzylphosphonate,[(3-Bromophenyl)methyl]phosphonic acid diethyl ester
- Synonyms
- Diethyl m-bromobenzylphosphonate, [(3-Bromophenyl)methyl]phosphonic acid diethyl ester

Organic Synthesis Intermediate
Diethyl 3-bromobenzylphosphonate is employed as a key intermediate in the synthesis of various organic compounds. Its reactive benzyl bromide moiety and phosphonate group allow for diverse chemical modifications and coupling reactions.
Pharmaceutical Research
The compound can be utilised in the development of novel pharmaceutical candidates. Its structure may be incorporated into biologically active molecules through established synthetic pathways.
Material Science
Phosphonate-containing compounds are sometimes explored for applications in material science, such as in the development of flame retardants or surface modifiers. Diethyl 3-bromobenzylphosphonate may serve as a precursor in such investigations.
| Molecular weight | 307.12 |
|---|---|
| Empirical formula | C11H16BrO3P |
| Assay | 97% |
| Density | 1.343 g/mL at 25 °C |
| Refractive index | n20/D 1.523 |

Hazard statements
- H302Harmful if swallowed
| Flash point | >110 °C / >230 °F |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22 |
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 Diethyl 3-bromobenzylphosphonate primarily used for?
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Diethyl 3-bromobenzylphosphonate is primarily used as an intermediate in organic synthesis, particularly in the development of new molecules for pharmaceutical research and material science applications.
What are the CAS number and molecular formula for Diethyl 3-bromobenzylphosphonate?
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The CAS number for Diethyl 3-bromobenzylphosphonate is 128833-03-4, and its molecular formula is C11H16BrO3P.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diethyl 3-bromobenzylphosphonate with a minimum assay of 97%. This product is suitable for research and synthesis purposes and is not supplied as USP, BP, EP, or any pharmacopoeia grade.
How should Diethyl 3-bromobenzylphosphonate be handled safely?
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Diethyl 3-bromobenzylphosphonate is classified as harmful if swallowed (H302). It should be handled with appropriate personal protective equipment, including gloves and eye protection, in a well-ventilated area. Avoid ingestion and contact with skin and eyes. Refer to the Safety Data Sheet (SDS) for comprehensive handling information.
Is Diethyl 3-bromobenzylphosphonate a controlled substance?
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Based on the provided data, Diethyl 3-bromobenzylphosphonate is not indicated as a controlled substance.
How is Diethyl 3-bromobenzylphosphonate packed and exported?
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Tech Serve Solutions securely packs and exports Diethyl 3-bromobenzylphosphonate, adhering to all relevant international shipping regulations for chemical compounds.
How can I request a quote or sample of Diethyl 3-bromobenzylphosphonate?
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To request a quote or a sample of Diethyl 3-bromobenzylphosphonate, please contact our sales team through the TSS website or by phone.
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