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.




MPS-EDA•TFA, product number QBD-10177, is the trifluoroacetic acid salt of N-(2-aminoethyl)-3-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)propanamide. This product crosslinks a sulfhydryl group and a carboxylic acid. The spacer length from the maleimide reactive site to the terminal nitrogen is ten (10) atoms long (10.7 Å). The product is a highly water-soluble white solid. It is extremely stable under recommended storage conditions. Although this product does not contain a dPEG® linker or spacer, it can be conjugated to the carboxylic acid termini of various dPEG® products to form maleimide-functionalized constructs.


Unit Size100 mg, 1000 mg
Molecular Weight325.24; single compound
Chemical formulaC₁₁H₁₄F₃N₃O₅
Purity> 98%
SpacersSpacer is 10 atoms and 10.7 Å
Typical solubility properties (for additional information contact Customer Support)DMAC, DMSO or water.
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.


  1. 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.

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