• USA Home
  • 181978 - Poly(ethyleneimine) solution

181978 Sigma-Aldrich

Poly(ethyleneimine) solution

average Mn ~60,000 by GPC, average Mw ~750,000 by LS, 50 wt. % in H2O

Synonym: Ethyleneimine polymer solution, PEI



Related Categories Branched PEI solutions, Hydrophilic Polymers, Materials Science, Poly(2-oxazoline) and Polyethylenimine (PEI), Polyethylenimine (PEI),
Quality Level   200
vapor pressure   9 mmHg ( 20 °C)
mol wt   average Mn ~60,000 by GPC
  average Mw ~750,000 by LS
concentration   50 wt. % in H2O
InChI   1S/C2H5N/c1-2-3-1/h3H,1-2H2



Detergents, adhesives, water treatment, printing inks, dyes, cosmetics, and paper industry, adhesion promoter, lamination primer, fixative agent, flocculant, cationic dispersant, stability enhancer, surface activator, chelating agent, scavenger for aldehydes and oxides.

Protein precipitant.


18 kg in poly drum

5, 100, 250 g in poly bottle

Physical form

Branched polymer

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Hazard Codes (Europe) 
Risk Statements (Europe) 
Safety Statements (Europe) 
UN 3082 9 / PGIII
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

Please Enter a Lot Number

Certificate of Origin (COO)

Please Enter a Lot Number

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
Product 181978, Poly(ethyleneimine) solution, is listed as a solution but it is sold by weight; is this a solid or a liquid?
This product is a solution of Poly(ethyleneimine) in water. However, this product, like many Sigma-Aldrich products, is weighed into the bottle. If 5 grams of this solution is purchased, approximately 4.62mL will be received.
What possible impurities are present in Product 181978, Poly(ethyleneimine) solution?
Although Sigma-Aldrich does not currently test for the impurities in this product, 2-aminoethanol and less than 50 ppb of unreacted monomer may be present as a result of the manufacturing process.
I see two molecular weight values reported for Product 181978, Poly(ethyleneimine) solution. Which one is correct?
Both of the approximate molecular weights listed for this product are correct based on the testing methods used by Sigma-Aldrich. However, each molecular weight is determined by a different method. The Mn refers to the number-average molecular weight (determined by GPC) while the Mw refers to the weight-average molecular weight (determined by Light Scattering). These two numbers are different but still related. The polydispersity is the measure of uniformity of the molecules in a polymer sample. A ratio of the weight-average molecular and the number-average molecular weight indicates how uniform the polymer sample is. The greater the ratio the less uniform the polymer molecules.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
My question is not addressed here, how can I contact Technical Service for assistance?
Ask a Scientist here.
My question is not addressed here, how can I contact Technical Service for assistance?
Ask a Scientist here.
Protocols & Articles


Functionalized Pei and Its Role in Gene Therapy

1Department of Pharmacy, Pharmaceutical Technology and Biopharmacy,  Ludwig-Maximilians-Universität München, Butenandtstraße 5, 81377  München, Germany 2Nanosystems Initiative Munich (NIM), Ludwig-Ma...
Bettina Schwarz,1 Olivia M. Merkel1,2*
Material Matters, 2017, 12.2
Keywords: Bacterial conjugations, Clinical, Condensations, Degradations, Diseases, Gene expression, Genetic, Infrared spectroscopy, Ligands, Michael Addition, Microscopy, Nanotubes, Pharmaceutical, Reductions, Substitutions, Transfection

Nanoparticle-Based Drug and Gene Delivery for Tumor Targeting

Department of Chemistry and Biochemistry, Faculty of Engineering, Kyushu University, Japan *E-mail: ykatatcm@mail.cstm.kyushu-u.ac.jp
Keywords: Amplification, Angiogenesis, Biochemistry, Cancer, Cardiovascular, Clinical, Diagnostic, Electron spin resonance, Enzyme activity, Gene expression, Genetic, Infrared spectroscopy, Reductions, Transcription

Novel Inks for Direct-Write Assembly of 3-D Periodic Structures

New methods for materials fabrication at the micro- and nanoscale will drive scientific and technological advances in areas of materials science, chemistry, physics, and biology. The broad diversity ...
Prof. Jennifer A. Lewis
Material Matters 2008, 3.1, 4.
Keywords: Applications, Biomaterials, Capabilities, Coagulants, Coagulation, Deposition, Environmental, Materials Science, Methods, Photographs, Reductions, Semiconductor, Size-exclusion chromatography, Sol-gel, Support, Type

Polyelectrolyte Multilayer Films and Membrane Functionalization

Among the many methods for preparing thin films, layer-by-layer (LbL) deposition of complementary polymers has emerged as an especially versatile technique for controlling film thickness and function...
Merlin L. Bruening, Maneesha Adusumilli
Material Matters Volume 6 Number 3
Keywords: Adsorption, Catalysis, Deposition, Diffusion, Digestions, Electrophoresis, Gel electrophoresis, Immobilization, Mass spectrometry, Nanotechnology, Phase transitions, Reductions

Related Products

Technical Service:

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?