Poly(ethylene glycol) methyl ether 2-bromoisobutyrate
Poly(ethylene glycol) methyl ether 2-bromoisobutyrate (CAS 245070-97-7) is a valuable ATRP initiator, featuring a hydrophilic polyethylene glycol (PEG) chain and a bromoisobutyrate initiating group. This bifunctional molecule is supplied as a powder with an average molecular weight of 2,000 and a polydispersity index (Mw/Mn) of ≤1.2. Its primary application lies in controlled radical polymerisation, enabling the synthesis of well-defined polymers with enhanced biocompatibility.
- IUPAC
- ATRP initiator,PEG methyl ether bromoisobutyrate,mPEG bromoisobutyrate
- Synonyms
- mPEG-BrPoly(ethylene glycol) methyl ether2-BromoisobutyratePEG methyl ether bromoisobutyrate

ATRP Initiator for Polymer Synthesis
This compound serves as a key initiator in Atom Transfer Radical Polymerisation (ATRP) to create polymers with controlled architectures. The PEG chain imparts hydrophilicity and can improve the biocompatibility of the resulting polymer.
Surface Functionalisation
It can be used to modify surfaces, introducing PEG chains that can alter surface properties such as wettability and protein adsorption. This is useful in biomaterials and nanotechnology applications.
Block Copolymer Synthesis
The molecule is instrumental in synthesising block copolymers, allowing for the precise control over the length and composition of each block, leading to advanced materials with tailored properties.
| Linear formula | CH3O(CH2CH2O)nCOC(CH3)2Br |
|---|---|
| Form | powder |
| Application | PEG-containing ATRP initiator for generating a hydrophilic block, as well as enhancing biocompatibility. |
| Flash point | >110 °C / >230 °F |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Mol Wt | average Mn 2,000 |
|---|---|
| Transition Temp | Tm 47-52 |
| Mw Mn | ≤1.2 |
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 Poly(ethylene glycol) methyl ether 2-bromoisobutyrate used for?
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Poly(ethylene glycol) methyl ether 2-bromoisobutyrate is primarily used as an initiator in Atom Transfer Radical Polymerisation (ATRP) for creating polymers with controlled architectures and enhanced biocompatibility, and for surface functionalisation.
What is the CAS number and chemical formula?
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The CAS number is 245070-97-7. The linear formula is CH₃O(CH₂CH₂O)nCO C(CH₃)₂Br.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this product with an average Mn of 2,000 and a Mw/Mn of ≤1.2. We do not represent this product as USP, BP, or EP grade.
How should this chemical be handled and stored?
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This compound has a flash point above 110 °C (230 °F). Please refer to the Safety Data Sheet for comprehensive handling and storage recommendations. It is classified under WGK 2 in Germany.
Is this chemical suitable for human or animal consumption?
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This chemical is intended for research and development purposes only and is not approved for human or animal consumption or for use in pharmaceutical products.
How is this product packed, shipped, and exported?
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Tech Serve Solutions specialises in the global supply and export of fine chemicals, ensuring appropriate packaging and compliance with international shipping regulations.
How can I request a sample or quote?
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To request a sample or a quote, please contact our sales team through the Tech Serve Solutions website, providing the product name and CAS number (245070-97-7).
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