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iFluor® 647–dextran conjugate (average MW = ~10K)

Product key features

  • Fluorophore Properties: Conjugated to iFluor® 647, a far-red fluorophore with Ex/Em max = ~656/670 nm; spectrally analogous to Alexa Fluor® 647 and Cy5.
  • Dextran Carrier: ~10,000 Da dextran provides efficient endocytic uptake and intracellular diffusion, ideal for fluid-phase tracer applications and vesicular transport studies.
  • Application Areas: Optimized for endocytosis tracking, intracellular trafficking, and fluid-phase uptake assays in both live and fixed cell systems.
  • Photostability & Brightness: Strong fluorescence intensity, high quantum yield, and resistance to photobleaching for reliable, long-term signal detection.
  • Spectral Advantage: Far-red emission minimizes cellular autofluorescence and allows for deep tissue imaging and sensitive detection in complex biological samples.

Product description

iFluor® 647–dextran conjugate (average molecular weight ~10,000 Da) is a hydrophilic fluorescent probe composed of a 10 kDa dextran polymer covalently labeled with iFluor® 647, a far-red-emitting dye with excitation and emission maxima at approximately 656 nm and 670 nm, respectively. The relatively low molecular weight of the dextran backbone supports efficient cellular uptake and intracellular diffusion, making this conjugate particularly suitable for applications such as endocytosis tracking, fluid-phase uptake assays, and vesicular transport studies.

iFluor® 647 exhibits spectral characteristics comparable to Alexa Fluor® 647 and Cy5, offering high fluorescence quantum yield, excellent photostability, and minimal spectral overlap with visible-range fluorophores. Its far-red emission profile provides low background fluorescence and enhanced penetration in tissue imaging, enabling multiplexing with other fluorophores in multi-color flow cytometry and microscopy applications. The conjugate is supplied as a lyophilized powder and reconstitutes readily in aqueous buffers, providing a reliable and high-sensitivity tracer for both live-cell and fixed-sample experiments requiring detection in the far-red spectral range.

Spectrum

Product family

NameExcitation (nm)Emission (nm)Extinction coefficient (cm -1 M -1)Quantum yieldCorrection Factor (260 nm)Correction Factor (280 nm)Correction Factor (656 nm)
iFluor® 405–dextran conjugate (average MW = ~10K)4034273700010.9110.480.77-
iFluor® 647–dextran conjugate (average MW = ~150K)65667025000010.2510.030.030.0793
iFluor® 647–dextran conjugate (average MW = ~20K)65667025000010.2510.030.030.0793
iFluor® 647–dextran conjugate (average MW = ~70K)65667025000010.2510.030.030.0793

References

View all 41 references: Citation Explorer
Colon-targeted complement C5a1 receptor inhibition using pH-sensitive nanoparticles ameliorates experimental colitis.
Authors: Cui, Cedric S and Lerskiatiphanich, Titaya and Li, Xaria X and Giri, Rabina and Liu, Ning and Kumar, Vinod and Whittaker, Andrew K and Han, Felicity Y and Clark, Richard J and Begun, Jakob and Lee, John D and Woodruff, Trent M
Journal: British journal of pharmacology (2025)
Novel endocytosis inhibitors block entry of HIV-1 Tat into neural cells.
Authors: Szewczyk-Roszczenko, Olga Klaudia and Roszczenko, Piotr and Shmakova, Anna and Yushyn, Ihor and Holota, Serhii and Karpenko, Olexandr and Czarnomysy, Robert and Bielawska, Anna and Vassetzky, Yegor and Lesyk, Roman and Bielawski, Krzysztof
Journal: American journal of physiology. Cell physiology (2025): C404-C413
Regulation of IFP in solid tumours through acoustic pressure to enhance infiltration of nanoparticles of various sizes.
Authors: He, Yangcheng and Feng, Yuyi and Qiu, Danxai and Lin, MinHua and Jin, Hai and Hu, Zhiwen and Huang, Xue and Ma, Suihong and He, Yan and Lai, Meiqi and Jin, Wenhui and Liu, Jianhua
Journal: Journal of drug targeting (2024): 964-976
Acid-Responsive Decomposable Nanomedicine Based on Zeolitic Imidazolate Frameworks for Near-Infrared Fluorescence Imaging/Chemotherapy Combined Tumor Theranostics.
Authors: Guo, Heze and Mukwaya, Vincent and Wu, Daikun and Xiong, Shuhan and Dou, Hongjing
Journal: Pharmaceutics (2024)
Nanoparticle Delivery of an Oligonucleotide Payload in a Glioblastoma Multiforme Animal Model.
Authors: Kim, Bryan D and Mondal, Sujan K and Kenyon, Elizabeth and Chen, Ming and Mallett, Christiane L and deCarvalho, Ana C and Medarova, Zdravka and Moore, Anna
Journal: Journal of visualized experiments : JoVE (2024)
Page updated on July 2, 2025

Ordering information

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Catalog Number21718
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Additional ordering information

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Physical properties

Solvent

Water

Spectral properties

Correction Factor (260 nm)

0.03

Correction Factor (280 nm)

0.03

Correction Factor (656 nm)

0.0793

Extinction coefficient (cm -1 M -1)

2500001

Excitation (nm)

656

Emission (nm)

670

Quantum yield

0.251

Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22

Storage

Freeze (< -15 °C); Minimize light exposure