Poly(ethylene glycol)bis(3-aminopropyl) terminated (DAPEG Series)
Chemical Name: α-(3-Aminopropyl)-ω-(3-aminopropoxy)poly(oxy-1,2-ethanediyl)
Molecular Formula: H₂N(CH₂)₃[O(CH₂)₂]nO(CH₂)₃NH₂
CAS Number: 34901-14-9
VUP is the unique global producer of high-purity DAPEG featuring PEG chains with reactive primary amine groups at both ends. Essential for advanced biomedical coatings, surface modification, PEGylation, and specialty polymer synthesis.

Technical Specifications
Discover the technical specifications of our Poly(ethylene glycol)bis(3-aminopropyl) terminated (DAPEG Series) products.
Chemical Identity
| Chemical Name | α-(3-Aminopropyl)-ω-(3-aminopropoxy)poly(oxy-1,2-ethanediyl) |
| Synonyms | DAPEG, Diaminopolyethylene Glycol, Amino-PEG-Amino, α,ω-Diamino-PEG |
| CAS Number | 34901-14-9 |
| EC Number | |
| Molecular Formula | H₂N(CH₂)₃[O(CH₂)₂]nO(CH₂)₃NH₂ |
| Molecular Weight | 700-3400 g/mol |

VUP Specifications (Standard Grade)
| Property | Specification |
|---|---|
| Appearance | Colorless to pale yellow liquid or white waxy solid |
| Purity | min. 97.0 % wt |
Note: Specifications that are provided above are typical values and should not be considered as guaranteed analysis.
Key Features & Benefits
Discover the unique advantages of VUP's Poly(ethylene glycol)bis(3-aminopropyl) terminated (DAPEG Series) for your applications.
Unique Global Supply
Sourced directly from VUP, the sole global producer utilizing proprietary technology, ensuring a distinct and secure supply chain.
High Quality Standards
Manufactured to high purity standards (97% min), critical for demanding biomedical and pharmaceutical applications requiring consistent performance.
Reactive Amine Termini
Provides primary amine groups at both ends, enabling efficient covalent attachment to surfaces or reaction with other functional groups for polymer synthesis.
PEG Chain Properties
Imparts hydrophilicity, water solubility, biocompatibility, and resistance to non-specific protein adsorption inherent to polyethylene glycol chains.
Versatile Molecular Weights
Available in a range of average molecular weights, allowing tailoring of properties like chain length, flexibility, and hydrodynamic volume.
Biomedical Application Focus
Proven utility as a key raw material for creating lubricious, hydrophilic coatings essential for medical devices like catheters and guidewires.
Applications
Discover the applications of our Poly(ethylene glycol)bis(3-aminopropyl) terminated (DAPEG Series) products.
Biomedical Device Coatings
Creating lubricious, hydrophilic, and biocompatible coatings for catheters, guidewires, stents, and other medical devices to improve patient comfort and device performance.
Surface Modification
Functionalizing surfaces of implants, nanoparticles, biosensors, and microfluidic devices to enhance biocompatibility and reduce non-specific binding.
PEGylation & Bioconjugation
Linking PEG chains to proteins, peptides, antibodies, or drug molecules to improve solubility, stability, circulation time, and reduce immunogenicity.
Advanced Polymer Synthesis
Building block for synthesizing hydrogels for tissue engineering and drug delivery, block copolymers, and other functional polymer architectures.
PEGDAA Synthesis
Direct precursor for producing Poly(ethylene glycol) diacrylamide (PEGDAA), used in hydrogel formation and specialized coating applications.
Product Information & Technical Documents
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Product Identification
Key product details and identifiers
Technical Documents
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Technical Data Sheet (TDS)
Complete technical specifications, physical properties, and application information for Poly(ethylene glycol)bis(3-aminopropyl) terminated (DAPEG Series)
Safety Data Sheet (SDS)
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Frequently Asked Questions
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