Polymers
Polyethylenimine (PEI)
Polyethylenimine (PEI) is a versatile cationic polymer widely used in transfection, gene delivery, surface coating, and nanoparticle synthesis. Polysciences offers a range of linear and branched PEI polymers in various molecular weights and purities to meet your research or formulation needs. Trusted by academic and industrial labs, our PEI products deliver high efficiency and consistency. Need help selecting the right grade? Our technical experts are here to assist.
Collections
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Bioprocessing, Lipids & Transfection
Find transfection reagents and lipids with various preparations and regulatory tiers to...
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Electronic Chemicals
Access our portfolio of electronic chemicals, including underfills, encapsulants, and conformal coatings,...
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Histology, Cytology & Pathology
Explore a comprehensive range of products for histology, cytology, and pathology, including...
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Instrument Standards
Find instrument standards for analytical instruments like cell analyzers and flow cytometers,...
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Histology & Microscopy
Equip your lab with our histology and microscopy products, offering high-quality staining...
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Life Sciences
Discover specialty chemicals and reagents supporting research in histology, microscopy, and anatomic...
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Microscopy & Electron Microscopy
Delve into our microscopy collections, featuring electron microscopy reagents and accessories essential...
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Microspheres & Particles
Browse our selection of microspheres and particles, featuring magnetic, fluorescent, and protein-coated...
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Specialty Chemicals & Adjuncts
Access our range of specialty chemicals and adjuncts, including resins, catalysts, solvents,...
