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MedKoo CAT#: 572345


Description: N-(Ac-PEG3)-N'-(azide-PEG3)-Cy7 is a Cy7 labeled near infrared fluorescent (NIF) PEG derivative containing an azide group, which enables Click Chemistry. The hydrophilic PEG spacer increases solubility in aqueous media. This reagent can be utilized to produce Cy7-labeled biomolecules for potential in vivo research and drug design related experiments.

Price and Availability

Size Price Shipping out time Quantity
1mg USD 330 2 Weeks
5mg USD 900 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2020-09-20. Prices are subject to change without notice.

N-(Ac-PEG3)-N'-(azide-PEG3)-Cy7, purity > 97%, 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#: 572345
Name: N-(Ac-PEG3)-N'-(azide-PEG3)-Cy7
Chemical Formula: C43H58ClN5O7
Exact Mass: 791.4025
Molecular Weight: 792.42
Elemental Analysis: C, 65.18; H, 7.38; Cl, 4.47; N, 8.84; O, 14.13

Synonym: N-(Ac-PEG3)-N'-(azide-PEG3)-Cy7

IUPAC/Chemical Name: 1-(2-(2-(2-acetoxyethoxy)ethoxy)ethyl)-2-((1E,3E,5E)-7-((E)-1-(2-(2-(2-(2-azidoethoxy)ethoxy)ethoxy)ethyl)-3,3-dimethylindolin-2-ylidene)hepta-1,3,5-trien-1-yl)-3,3-dimethyl-3H-indol-1-ium chloride


InChi Code: InChI=1S/C43H58N5O7.ClH/c1-35(49)55-34-33-54-32-29-52-26-23-48-39-18-14-12-16-37(39)43(4,5)41(48)20-10-8-6-7-9-19-40-42(2,3)36-15-11-13-17-38(36)47(40)22-25-51-28-31-53-30-27-50-24-21-45-46-44;/h6-20H,21-34H2,1-5H3;1H/q+1;/p-1


Technical Data

Solid powder

>97% (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

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: DMSO, DMF, DCM, low solubility in water
Excitation maximum (nm): 750
Extinction coefficient and excitation maximum, Lmol-1cm-1: 199000
Emission maximum (nm): 773


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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.