Polyethylenimine
PEI, Polyaziridine, Aziridine Homopolymer.
- CAS
- 9002-98-6
- EC
- 618-346-1
- Sectors
- Water & Wastewater Treatment, Textiles, Leather & Paper
Polyethylenimine (CAS 9002-98-6) is a cationic polymer with a highly branched, amine-rich backbone, available as a clear, pale yellow viscous liquid that acts as a flocculant for complex industrial waste streams and as a retention and drainage aid in paper manufacturing. Available in various Molecular Weight distributions, it serves as a powerful flocculant for complex industrial waste streams.
This polymer exhibits exceptional chelating properties, allowing it to bind heavy metal ions and acidic pollutants effectively. In paper manufacturing, it acts as a superior retention aid and drainage promoter, improving the mechanical strength of the final product.
Its amine-rich backbone provides numerous sites for chemical modification and surface adhesion, making it ideal for specialized coating applications. It is commercially supplied as a Liquid Solution to facilitate easy dosing in automated systems.
Typical Properties
| Molecular formula | (C2H5N)x |
|---|---|
| Molecular weight | 43.07 g/mol |
| Appearance | Clear viscous liquid |
| Form | Liquid |
| Color | Pale yellow |
| Melting point | 50 °C (approx) |
| Boiling point | 250 °C |
| Density | 1.27 g/cm³ |
| Water solubility | Soluble in water. |
| Flash point | >230 °F |
| pH | pH(50g/l, 25°C) : 10～12 |
| HS code | 39019090 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Polyethylenimine
Applications
- Flocculation & Coagulation: Efficiently removes negatively charged particles and suspended solids in industrial wastewater treatment.
- Paper Processing: Enhances filler retention and improves dewatering rates on paper machines to increase production speed.
- CO2 Capture: Utilized in research and gas treatment for its ability to reversibly adsorb acidic gases from air streams.
Safety & Risks
Classified as Corrosive and Harmful if Swallowed. Use Chemical-Resistant Gloves, Face Shields, and Protective Coveralls during handling.
Packaging
200 kg Drums or 1000 kg IBC Tanks.