Vector Laboratories is closed for the President’s Day on Monday, February 19th. We will be back in the office on Tuesday, February 20th.
We will respond to emails upon our return. Have a wonderful day.

Bis-dPEG®₂-NHS ester (QBD-10724)



Bis-dPEG®2-NHS ester, product number QBD-10724, is a homobifunctional, amine-reactive, crosslinking reagent. Each end of the short (10 atoms, 11.0 Å), single molecular weight, discrete PEG (dPEG®) linker is functionalized as the N-hydroxysuccinimidyl (NHS) ester of a propionic acid group. The optimal pH range for reacting the end groups is 7.0 – 7.5. The product is soluble in water and many organic solvents; however, in water, it hydrolyzes rapidly. Therefore, we advise against storing aqueous stock solutions of this product. Rather, unused material in aqueous media should be discarded promptly.


Unit Size100mg, 1000mg
Molecular Weight400.34; single compound
Chemical formulaC₁₆H₂₀N₂O₁₀
Purity> 98%
SpacersdPEG® Spacer is 10 atoms and 11.0 Å
Typical solubility properties (for additional information contact Customer Support)Methylene chloride, Acetonitrile, DMAC or DMSO.
Storage and handling-20°C; Always let come to room temperature before opening; be careful to limit exposure to moisture and restore under an inert atmosphere; stock solutions can be prepared with dry solvent and kept for several days (freeze when not in use). dPEG® pegylation compounds are generally hygroscopic and should be treated as such. This will be less noticeable with liquids, but the solids will become tacky and difficult to manipulate, if care is not taken to minimize air exposure.


Greg T. Hermanson, Bioconjugate Techniques, 3rd Edition, Elsevier, Waltham, MA 02451, 2013, ISBN 978-0-12-382239-0; See Chapter 18, Discrete PEG Reagents, pp. 787-821, for a full overview of the dPEG® products.

Multivalent Benzamidine Molecules for Plasmin Inhibition: Effect of Valency and Linker Length. Tanmaye Nallan Chakravarthula, Dr. Ziqian Zeng, Prof. Nathan J. Alves. ChemMedChem, Volume 17, Issue 22, (2022), 09/16/2022,

Applicable patents and legal notices are available at legal notices.

How do I Request a Quote?

To request a quote for products:

  1.  Log in to
  2.  Add the items you wish to quote to the cart;
  3.  View your cart;
  4.  Click on the “Request a Quote” button found below the items in your cart;
  5.  Download your quote