Pentaerythritol tetrakis(2-bromoisobutyrate)
Pentaerythritol tetrakis(2-bromoisobutyrate) (CAS: 243991-62-0) is a tetrafunctional initiator with the molecular formula C21H32Br4O8. This compound is primarily utilised in atom transfer radical polymerisation (ATRP) for the synthesis of complex polymer architectures, particularly four-arm star polymers. Its well-defined structure enables controlled polymer growth from multiple sites simultaneously, making it valuable in advanced materials science and polymer chemistry.
- IUPAC
- 4f-BiB,Tetrafunctional initiator,Tetrakis(2-bromoisobutyryloxymethyl)methane

ATRP Initiator for Star Polymers
Serves as a key initiator in Atom Transfer Radical Polymerisation (ATRP) to synthesize tetrafunctional polymers. It enables the controlled growth of polymer chains from four distinct points, leading to the formation of well-defined four-arm star polymers.
Advanced Polymer Synthesis
Facilitates the creation of advanced polymer structures with precise control over molecular architecture. This is crucial for developing materials with tailored properties for specialised applications in various fields.
Materials Science Research
Utilised in materials science for the development of novel polymeric materials. The ability to form star architectures can lead to unique bulk properties, such as improved rheology or mechanical performance.
Controlled Radical Polymerization
A highly effective reagent for controlled radical polymerisation techniques, allowing for predictable chain growth and the synthesis of polymers with low dispersity.
| Molecular weight | 732.09 |
|---|---|
| Empirical formula | C21H32Br4O8 |
| Assay | 97% |
| Form | solid |
| Application | Atom Transfer Radical Polymerization (ATRP) initiator for the creation of tetrafunctional polymers.1,2,3Polymerization will occur at four sites creating a four-arm star polymer. |
| Melting point | 130-134 °C |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335SULFATE
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Water hazard class (WGK, DE) | 1 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38Fe: ≤5 ppm |
| Safety statements (S) | 26-36/39heavy metals (as Pb): ≤5 ppm |
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 Pentaerythritol tetrakis(2-bromoisobutyrate) used for?
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Pentaerythritol tetrakis(2-bromoisobutyrate) is primarily used as a tetrafunctional initiator in Atom Transfer Radical Polymerisation (ATRP) for the synthesis of four-arm star polymers and other complex polymer architectures.
What are the CAS number and formula for this compound?
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The CAS number is 243991-62-0, and its empirical formula is C21H32Br4O8.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Pentaerythritol tetrakis(2-bromoisobutyrate) with an assay of 97%. We do not represent this product as USP, BP, EP, or other pharmacopoeia grades.
How should Pentaerythritol tetrakis(2-bromoisobutyrate) be handled?
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Pentaerythritol tetrakis(2-bromoisobutyrate) is a Warning substance (GHS07) that may cause skin irritation (H315), eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment in a well-ventilated area. Avoid breathing dust. Users should consult the Safety Data Sheet (SDS) for comprehensive handling and safety information.
Is this chemical available for export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals and laboratory reagents, including Pentaerythritol tetrakis(2-bromoisobutyrate).
How can I request a sample or quote?
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Please use the 'Request a Quote' or 'Sample Request' form on our website, or contact our sales team directly to inquire about samples or pricing for Pentaerythritol tetrakis(2-bromoisobutyrate).
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