Polyethyleneimine (PEI) CAS 9002-98-6 | Branched & Linear PEI Manufacturer China
Polyethyleneimine (PEI) Product Introduction
Polyethyleneimine (PEI, CAS 9002-98-6) is a high-molecular-weight organic amine compound containing numerous primary, secondary, and tertiary amine groups within its molecular chain, exhibiting extremely high cationic density and reactivity. Based on its molecular structure, polyethyleneimine is classified into two types: linear (L-PEI) and branched (B-PEI), each suitable for different industrial and scientific applications.
PEI is widely used in papermaking, textiles, wastewater treatment, metal chelation, coating dispersion, gene transfer vectors, and nanomaterial surface modification. It is a functional polymer material with extremely wide applications.
Physical & Chemical Properties
| Property | Specification |
|---|---|
| Product Name | Polyethyleneimine (PEI) |
| CAS Number | 9002-98-6 |
| Molecular Formula | (C2H5N)n |
| Appearance | Colorless to pale yellow viscous liquid or solid |
| Molecular Weight | 800 – 2,000,000 (customizable) |
| Structure Type | Branched or Linear |
| Solubility | Soluble in water, methanol, ethanol |
| pH (1% solution) | 10 – 12 |
| Viscosity (25°C) | 100 – 100,000 mPa·s (depending on MW) |
| Active Content | 50% aqueous solution or powder |
| Shelf Life | 12 – 24 months |
Product Applications
Paper Industry: Used as a wet and dry strength agent to improve paper strength and durability
Water Treatment: Cationic flocculant for removing suspended solids, heavy metals, and oil
Textile Industry: Improves dye adsorption and color fastness
Metal Chelation and Anticorrosion: Forms stable complexes with heavy metal ions
Coatings and Dispersions: Used as a dispersion stabilizer and adhesion promoter
Biotechnology: Gene transfection reagents, DNA/RNA carriers
Nanomaterial Modification: Improves surface charge distribution and dispersion
Product Advantages
High cationic density and strong reactivity
Customizable molecular weight, structure (linear/branched), and solid content
Direct factory supply, excellent price and quality
Complete documentation including COA, TDS, and MSDS
Suitable for a variety of industrial and research needs
Company Strengths
15+ years of experience in R&D and export of functional polymer chemicals
ISO9001 quality system certification
Exporting to over 50 countries with a comprehensive logistics network
Technical team offering application guidance and customized formulations
Year-round stock and timely delivery
Packaging and Storage
Packaging: 25kg/drum, 200kg/drum, or IBC drum (customizable)
Storage: Store tightly closed in a cool, dry place, away from direct sunlight.
Shelf Life: 12 months for liquid, 24 months for solid
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