Polyethylenimine, branched [MW 600], also known as bPEI 600 or PEI, is a highly branched cationic polyamine supplied as a liquid polymer. It contains primary, secondary, and tertiary amine groups in an approximately 25/50/25 ratio, making it useful in charge-based interaction, complexation, surface modification, and polymer formulation workflows.
Synonyms / related names: PEI; bPEI; branched polyethylenimine; poly(ethylenimine).
This product has a listed molecular weight of approximately 600, chemical purity of ≥99%, and viscosity specification of 500-2500 cPs. It is soluble in water at all molecular weights, as well as lower alcohols, glycols, and THF.
Researchers, formulators, and industrial users may use branched polyethylenimine in surface treatment, dispersions, coatings, adhesion-related formulation work, complexation studies, and cationic polymer research. For precursors to linear polyethylenimine, see poly(2-ethyl-2-oxazoline).
Key Properties
- Highly branched cationic polyamine
- CAS Number: 9002-98-6
- Product Number: 02371
- Synonyms: PEI, bPEI
- Linear Formula: (-NHCH2CH2-)x [-N(CH2CH2NH2)CH2CH2-]y
- Molecular Weight: ~600
- Chemical Purity: ≥99%
- Viscosity: 500-2500 cPs
- Amine distribution: approximately 25/50/25 primary/secondary/tertiary amines
- Soluble in water at all molecular weights, lower alcohols, glycols, and THF
Applications
Cationic Polymer Research
Branched polyethylenimine is used in research involving highly charged polyamines, electrostatic interactions, and cationic polymer behavior in aqueous and solvent-compatible systems.
Surface Treatment & Functionalization
bPEI 600 may be used in surface treatment workflows where amine functionality and high charge density are evaluated for interfacial modification, adhesion, or further chemical functionalization.
Dispersions & Complexation Studies
Polyethylenimine may be evaluated in dispersion, stabilization, and complexation workflows where amine-rich cationic polymers interact with compatible particles, polymers, or other charged species.
Coatings & Adhesion-Related Formulations
This low molecular weight branched PEI may be used in coatings and adhesion-related formulation research where amine functionality, substrate interaction, and polymer compatibility are important.
Solubility & Compatibility Considerations
- Soluble in water, lower alcohols, glycols, and THF
- High amine functionality can strongly affect pH, charge density, and compatibility
- Compatibility depends on solvent system, pH, ionic strength, additives, substrates, and processing conditions
- May interact with anionic polymers, acidic groups, particles, and other charge-bearing materials
- Evaluate compatibility before scale-up or use in final formulations
Final performance should be confirmed under the user’s specific application conditions, including concentration, pH, substrate chemistry, solvent system, additives, and processing method.
Preparation Tips
- Add gradually with appropriate mixing to support uniform incorporation
- Control pH and ionic strength when charge-based interactions are important
- Confirm compatibility with the intended solvent, substrate, polymer, or particle system before use
- Use clean equipment to reduce contamination during formulation
- Run small-scale trials before production or process transfer
Handling & Storage
- Store at room temperature
- Keep container tightly closed when not in use
- Use good ventilation and standard laboratory safety practices
- Wear protective gloves, protective clothing, and eye protection
- Avoid contact with skin and eyes
- Refer to the Safety Data Sheet before handling
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FAQ
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1. What is Polyethylenimine, branched [MW 600] used for?
Polyethylenimine, branched [MW 600] is used in cationic polymer research, surface treatment, functionalization, dispersions, complexation studies, coatings, and adhesion-related formulation work.
2. What is the molecular weight of this bPEI product?
The listed molecular weight is approximately 600.
3. What is the purity specification?
The product page lists chemical purity as ≥99%.
4. What solvents dissolve Polyethylenimine, branched [MW 600]?
The product page lists solubility in water at all molecular weights, lower alcohols, glycols, and THF.
5. How should Polyethylenimine, branched [MW 600] be stored?
Store the product at room temperature with the container tightly closed. Review the Safety Data Sheet for complete storage, handling, and personal protective equipment guidance.
Safety & Documentation
Polyethylenimine, branched [MW 600] should be handled with good ventilation, protective gloves, protective clothing, and eye protection. It may cause skin and eye irritation and may be harmful if absorbed through skin or swallowed. Refer to the Safety Data Sheet (SDS) for complete handling, storage, hazard, and technical information.
