Background on Creative PEGWorks website - leading PEG supplier.

mPEG-Azide, MW 20k

mPEG-Azide, MW 20k

Catalog No: PSB-2022
Product Name: mPEG-Azide, MW 20k
In Stock: Yes
SKUProduct Name
mPEG-Azide, MW 20k - 1g
mPEG-Azide, MW 20k - 5g
mPEG-Azide, MW 20k - 10g
Interested in Bulk Orders? Please contact us here


mPEG-Azide is a linear monofunctional PEG reagent with a reactive azido (N3) group. PEG-Azide is useful in PEGylation via a click chemistry reaction with alkyne or acetylene or strained cyclooctyne.

Azide-alkyne Huisgen cycloaddition  is a  1,3-dipolar cycloaddition  between an  azide  and a terminal or internal  alkyne  to give a  1,2,3-triazole. This reaction is termed the Copper(I)-catalyzed Azide-Alkyne Cycloaddition (CuAAC). When alkyne is replaced with strained cyclooctyne such as DBCO, the reaction is copper (Cu)-free click chemistry. By eliminating  cytotoxic copper catalysts, the bioorthogonal reaction proceeds without live cell toxicity.


Molecular weight: MW of PEG was measured by MALDI-MS or GPC. PDI (polydispersity index) of our linear PEG is 1.02-1.05 with very narrow MW distribution. The number of repeating ethylene oxide units (CH2CH2O) or the degree of polymerization is calculated dividing the PEG MW by 44 (44 is the molecular mass of one repeating unit).

Solubility: Soluble in water and aqueous buffer, chloroform, methylene chloride, DMF, DMSO, and less soluble in alcohol, toluene. Not soluble in ether.

Density: PEG density is approximately 1.125 g/mL

Physical form: PEG products generally appear as white or off-white powder, and for very low MW linear PEG such as MW 1k or less, it may appear as wax-like, semi-solid material due to the low MW and the type of functional groups.

Storage condition: PEG product shall be stored in the original form as received in a freezer at -20C or lower for long term storage. Stock solution of PEG reagents that do not contain oxygen or moisture sensitive functional groups may be temporarily stored in a refrigerator or ambient temperature for multiple days. Stock solution should avoid repeated freeze-and-thaw cycles. See Documents section for detailed storage and handling conditions.


1. Effect of End Groups and Grafting on the CO2 Separation Performance of Poly(ethylene glycol) Based Membranes , Macromolecules, 2011, 44 (19), pp 7727-7736,  Text.

2. Biomimetic Mussel Adhesive Inspired Clickable Anchors Applied to the Functionalization of Fe3O4 Nanoparticles, Macromol. Rapid Commun. 2010, 31, 1608-1615,  Text.

3. Template-Directed Synthesis of Structurally Defined Branched Polymers. Macromolecules 48.5 (2015): 1296-1303.  Text.

4. Click-PEGylation – A mobility shift approach to assess the redox state of cysteines in candidate proteins, Free Radical Biology and Medicine, Volume 108, July 2017, Pages 374-382, Text.

5. Two-in-One: ÃŽ »-Orthogonal Photochemistry on a Radical Photoinitiating System, Macromolecular Rapid Communications, 2017, 1600598, Text.

6. Enhancing intracranial delivery of clinically relevant non-viral gene vectors, RSC  Adv., 2016,6, 41665-41674, Text.

7.  Ren, Xi, et al. “Metabolic glycan labeling and chemoselective functionalization of native biomaterials.”  Biomaterials  (2018), Text.

8. Targeting and monitoring ovarian cancer invasion with an RNAi and peptide delivery system, PNAS, 121(11):e2307802121, 2024, Text, PDF.

Click here  to view an expanded list of hundreds of publications citing Creative PEGWorks products.


 Technical Information_Linear PEG Products
 SDS of mPEG-Azide

Get In Touch

If you have any questions, please submit an online inquiry.

"*" indicates required fields

Your Name*
Do you wish to receive emails for new product introduction and sale promotions?
By submitting this form, you are consenting to our privacy policy.
This field is for validation purposes and should be left unchanged.