Thermo Scientific™ Polyethyleneimine (PEI), M.W. 600 (branched, ≥99% purity), is a highly functional, low-viscosity cationic polymer widely used in nanomaterials research, chemical functionalisation, surface modification, chelation chemistry, polymer synthesis, biotechnology, and industrial formulation.

With a molecular weight of ~600, this branched PEI provides a high density of reactive primary, secondary, and tertiary amine groups while maintaining excellent solubility and low viscosity, making it ideal for fine chemical modifications, nanoparticle coating, and catalytic or resin functionalisation.

The reagent is supplied as a pale yellow liquid with an amine-like odour and is stable at ambient temperature, offering convenience for storage, transport, and laboratory processing.

Key Features & Benefits

Low Molecular Weight (M.W. 600)

• Lower viscosity than higher-MW PEIs (1,200 / 1,800 / 10,000 / 25,000 / 60,000)
• Ideal for precision chemical reactions, ligand development, and controlled functionalisation
• Enhances penetration, diffusion, and uniform coating on surfaces

High-Purity (≥99%) Branched Polyamine

• Provides consistent performance for analytical, research, and industrial workflows
• High amine content ensures strong electrostatic interactions and nucleophilicity
• Reacts readily with aldehydes, epoxides, isocyanates, activated esters, and metal ions

Excellent Solubility & Handling

• Fully water-soluble
• Soluble in many polar organic solvents
• Easy to mix, pipette, and process due to low viscosity
• Stable at ambient storage temperature

Chemical & Regulatory Information

Physical & Chemical Properties

Applications

1. Nanotechnology & Surface Modification

• Coating of nanoparticles (Au, Ag, silica, Fe₃O₄, polymers)
• Capping/stabilising agent for colloids
• Surface charge modification
• Layer-by-layer polyelectrolyte assembly

2. Chemical Synthesis & Catalysis

• Ligand precursor for catalytic complexes
• Functionalisation of resins & polymers
• Crosslinking agent for epoxy, polyurethane, & acrylic systems
• Reagent for dendrimer synthesis

3. Biotechnology (Research Use)

• DNA/RNA complexation and binding (non-therapeutic)
• Biomolecule immobilisation
• Component of hydrogels & biopolymer matrices

4. Environmental & Industrial

• Chelation of heavy metals
• Water treatment flocculant
• Additive in adhesive & coating formulations
• Anti-corrosion surface treatments

Ordering Information

Thermo Scientific™ Polyethyleneimine (PEI), M.W. 600 ≥99%, branched, is a highly versatile low-molecular-weight polyamine suitable for advanced organic synthesis, nanotechnology, polymer modification, and industrial applications. With its high purity, excellent solubility, and strong cationic functionality, this reagent is ideal for research and manufacturing environments requiring controlled reactivity and efficient surface interaction.