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81300 Sigma-Aldrich

Poly(ethylene glycol)

average Mn 20,000

Synonym: PEG



Related Categories Essential Chemicals, Materials Science, PEG and Oligo Ethylene Glycol, Poly(ethylene glycol), Poly(ethylene glycol) (PEG) and PEG Solutions,
Quality Level   200
form   flakes
mol wt   average Mn 20,000
mp   63-66 °C
Ω-end   hydroxyl
α-end   hydroxyl
InChI   1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2


General description

Polyethylene glycol (PEG) is a hydrophilic polymer. It can be easily synthesized by the anionic ring opening polymerization of ethylene oxide, into a range molecular weights and variety of end groups. When crosslinked into networks PEG can have high water content, forming “hydrogels”. Hydrogel formation can be initiated by either crosslinking PEG by ionizing radiation or by covalent crosslinking of PEG macromers with reactive chain ends. PEG is a suitable material for biological applications because it does not trigger an immune response.


PEG has been used to modify therapeutic proteins and peptides to increase their solubility and lower their toxicity.

Photopolymerized PEG hydrogels have emerging applications in the fabrication of bioactive and immunoisolating barriers for encapsulation of cells.


1 kg in poly bottle

5 kg in glass bottle

Other Notes

Molecular weight: Mn 16,000-24,000

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Single- & multi-channel pipettes from BRAND
Protocols & Articles


Cell Culture Scaffolds via Bio-orthogonal Click Reactions

1,2Malar A. Azagarsamy, 1Navakanth R. Gandavarapu, 1,2Kristi S. Anseth* 1Department of Chemical and Biological Engineering and 2the Howard Hughes Medical Institute, University of Colorado at Boulder,...
Keywords: Addition reactions, Adhesion, Biomaterials, Catalysis, Cell culture, Cell signaling, Chemical reactions, Click chemistry, Cycloadditions, Degradations, Growth factors, Huisgen Cycloaddition, Ligands, Michael Addition, Peptide synthesis, Polymerization reactions, Step-growth polymerization

Degradable Poly(ethylene glycol) Hydrogels for 2D and 3D Cell Culture

Progress in biotechnology fields such as tissue engineering and drug delivery is accompanied by an increasing demand for diverse functional biomaterials. For decades, research in polymeric biomateria...
Keywords: Absorption, Angiogenesis, Biomaterials, Catalysis, Cell culture, Degradations, Eliminations, Growth factors, Infrared spectroscopy, Ligands, Michael Addition, Polymerization reactions, Ring-opening polymerization

Polyethylene Glycol (PEG) Selection Guide

Poly(ethylene glycol) (PEG) is a synthetic, hydrophilic, biocompatible polymer with widespread use in biomedical and other applications. PEGs are synthesized using a ring-opening polymerization of et...
Keywords: Adhesion, Bacterial conjugations, Click chemistry, Molecular biology, PEGylations, Polymerization reactions, Ring-opening polymerization

Peer-Reviewed Papers


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