Background on Creative PEGWorks website - leading PEG supplier.

4-Arm PEG-Epoxide, MW 2k

4-Arm PEG-Epoxide, MW 2k

Catalog No: PSB-470
Product Name: 4-Arm PEG-Epoxide, MW 2k
In Stock: Yes
SKUProduct Name
4-Arm PEG-Epoxide, MW 2k - 5g
4-Arm PEG-Epoxide, MW 2k - 1g
4-Arm PEG-Epoxide, MW 2k - 10g
Interested in Bulk Orders? Please contact us here


4-Arm PEG-Epoxide is a multi-armed PEG derivative with epoxide or epoxy at each terminal of the four arms connected to one pentaerythritol core. Epoxide reacts with amine, hydroxyl groups at basic conditions. Epoxide also polymerizes when initiated with an alcohol molecule in the presence of catalyst to form polyether with pendant hydroxyl groups.


Molecular weight: 4-Arm PEG MW refers to the MW of the entire PEG molecule. The MW of each arm is 1/4 of the MW indicated in the product name. MW of PEG was measured by MALDI-MS or GPC. PDI (polydispersity index) of our 4-Arm 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 4-Arm PEG such as MW 2k, 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. Ultraflexible, Freestanding Nanomembranes Based on Poly (ethylene glycol). Advanced Materials 26.20 (2014): 3328-3332.  Text.

2. Low fouling label-free DNA sensor based on polyethylene glycols decorated with gold nanoparticles for the detection of breast cancer biomarkers. Biosensors and Bioelectronics 71 (2015): 51-56.  Text.

3. Redox and label-free array detection of protein markers in human serum. Analytical chemistry 86.11 (2014): 5553-5558.  Text

4. Connectivity defects enhance chain dynamics in supramolecular polymer model-network gels, DOI:  10.1002/polb.24250, 2016, Text.

5.   Chemical derivatization and biofunctionalization of hydrogel nanomembranes for potential biomedical and biosensor applications, Phys. Chem. Chem. Phys., 2016,18, 12035-12042, Text.

6. The Effect of Ultraviolet Light on Biorepulsive Hydrogel Poly(ethylene glycol) Films, ACS Appl. Polym. Mater.  2021, 3, 7, 3446–3454, Text.

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


 Technical Information_4-Arm PEG Products
 SDS of 4-Arm PEG-Epoxide

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.