We are open as normal during COVID-19 pandemic. Order online, same day shipping out from North Carolina, USA

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 572334


Description: N-(azide-PEG3)-N'-(Mal-PEG4)-Cy5 is a PEG derivative containing a cyanine dye with excitation/emission maximum 649/667 nm as well as an azide group, which enables Click Chemistry. The hydrophilic PEG spacer increases solubility in aqueous media.

Price and Availability

Size Price Shipping out time Quantity
1mg USD 410 2 Weeks
2mg USD 670 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2020-08-09. Prices are subject to change without notice.

N-(azide-PEG3)-N'-(Mal-PEG4)-Cy5, purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 572334
Name: N-(azide-PEG3)-N'-(Mal-PEG4)-Cy5
Chemical Formula: C50H68ClN7O10
Exact Mass: 961.4716
Molecular Weight: 962.58
Elemental Analysis: C, 62.39; H, 7.12; Cl, 3.68; N, 10.19; O, 16.62

Synonym: N-(azide-PEG3)-N'-(Mal-PEG4)-Cy5

IUPAC/Chemical Name: 1-(2-(2-(2-(2-azidoethoxy)ethoxy)ethoxy)ethyl)-2-((1E,3E)-5-((E)-1-(18-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-15-oxo-3,6,9,12-tetraoxa-16-azaoctadecyl)-3,3-dimethylindolin-2-ylidene)penta-1,3-dien-1-yl)-3,3-dimethyl-3H-indol-1-ium chloride


InChi Code: InChI=1S/C50H67N7O10.ClH/c1-49(2)40-12-8-10-14-42(40)55(24-28-63-32-36-66-35-31-62-27-22-53-54-51)44(49)16-6-5-7-17-45-50(3,4)41-13-9-11-15-43(41)56(45)25-29-64-33-37-67-39-38-65-34-30-61-26-20-46(58)52-21-23-57-47(59)18-19-48(57)60;/h5-19H,20-39H2,1-4H3;1H


Technical Data

Solid powder

>98% (or refer to the Certificate of Analysis)

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO, DMF, DCM, Water

Shelf Life:
>3 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:

Additional Information

Solubility: Water, DMSO, DMF, DCM
Excitation maximum (nm): 649
Extinction coefficient and excitation maximum, Lmol-1cm-1: 232000
Emission maximum (nm): 667


1: Chen X, Zhang X, Wang HY, Chen Z, Wu FG. Subcellular Fate of a Fluorescent Cholesterol-Poly(ethylene glycol) Conjugate: An Excellent Plasma Membrane Imaging Reagent. Langmuir. 2016 Oct 4;32(39):10126-10135. Epub 2016 Sep 21. PubMed PMID: 27597442.

2: Chen G, Wang L, Cordie T, Vokoun C, Eliceiri KW, Gong S. Multi-functional self-fluorescent unimolecular micelles for tumor-targeted drug delivery and bioimaging. Biomaterials. 2015 Apr;47:41-50. doi: 10.1016/j.biomaterials.2015.01.006. Epub 2015 Feb 4. PubMed PMID: 25682159; PubMed Central PMCID: PMC4329508.

3: Ruan S, Qian J, Shen S, Chen J, Zhu J, Jiang X, He Q, Yang W, Gao H. Fluorescent carbonaceous nanodots for noninvasive glioma imaging after angiopep-2 decoration. Bioconjug Chem. 2014 Dec 17;25(12):2252-9. doi: 10.1021/bc500474p. Epub 2014 Nov 11. PubMed PMID: 25387274.

4: Ruan S, Wan J, Fu Y, Han K, Li X, Chen J, Zhang Q, Shen S, He Q, Gao H. PEGylated fluorescent carbon nanoparticles for noninvasive heart imaging. Bioconjug Chem. 2014 Jun 18;25(6):1061-8. doi: 10.1021/bc5001627. Epub 2014 May 22. PubMed PMID: 24852402.

5: Paira TK, Saha A, Banerjee S, Das T, Das P, Jana NR, Mandal TK. Fluorescent amphiphilic PEG-peptide-PEG triblock conjugate micelles for cell imaging. Macromol Biosci. 2014 Jul;14(7):929-35. doi: 10.1002/mabi.201400083. Epub 2014 Mar 31. PubMed PMID: 24687698.

6: Okuda T, Kobayashi Y, Yanamoto S, Okamoto H. PEG conjugation of a near-infrared fluorescent probe for noninvasive dual imaging of lung deposition and gene expression by pulmonary gene delivery. J Drug Target. 2012 Nov;20(9):801-12. doi: 10.3109/1061186X.2012.722639. Epub 2012 Sep 26. PubMed PMID: 23009266.