Cy5 aldehyde

Cy5 aldehyde is a reactive red fluorescent dye that can react with an amine, hydrazine or hydroxylamine. Aldehyde group is reactive toward amines, hydrazide or hydroxylamine groups from pH 5-9. Unlike amine reactive succinimidyl ester group (NHS), aldehyde can react with N-terminal amine groups at acidic pH, a condition sometimes required for certain bioconjugation reactions. Aldehyde reacts with amine group to form an intermediate Schiff bond. Further reduction with hydride will form a stable C-N bond. Reaction between aldehyde and other groups allows site-specific conjugation and labeling of fluorescein dyes to desired position on targeted molecules. Conjugated Cy5 dye can be easily detected by a common fluorescence instrument under Cy5 channel.

Spectrum

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Product family

Name	Excitation (nm)	Emission (nm)	Extinction coefficient (cm ^-1 M ^-1)	Quantum yield	Correction Factor (260 nm)	Correction Factor (280 nm)	Correction Factor (482 nm)	Correction Factor (565 nm)
Cy5 tertrazine [Cy5 tertrazine]	651	670	250000¹	0.27¹, 0.4²	0.02	0.03	0.009	0.09
Cy5 tetrazine	651	670	250000¹	0.27¹, 0.4²	0.02	0.03	0.009	0.09
Cy3 aldehyde	555	569	150000¹	0.15¹	0.07	0.073	-	-
DBCO-Cy5	651	670	250000¹	0.27¹, 0.4²	0.02	0.03	0.009	0.09

References

View all 13 references: Citation Explorer

pH responsible and fluorescent Cy5.5-PEG-g-A-HA/CDDP complex nanoparticles: synthesis, characterization, and application for targeted drug delivery.
Authors: Cheng, Cui and Meng, Yabin and Zhang, Zhihong and Li, Ya and Liu, Chun and Zhang, Qiqing
Journal: Journal of materials science. Materials in medicine (2019): 58

[Microanalysis of Acetaldehyde Dehydrogenase 2 Genotype Based on SNaPShot-FCA].
Authors: Zeng, Shu-Shu and Gao, Xiu-Feng and Zhang, You and Feng, Chuan-Rui and Luo, Ya-Xiong and Wu, Xiao-Ting and Li, Yong-Sheng
Journal: Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition (2019): 737-742

Tumoral Acidic pH-Responsive cis-Diaminodichloroplatinum-Incorporated Cy5.5-PEG- g-A-HA Nanoparticles for Targeting Delivery of CDDP against Cervical Cancer.
Authors: Cheng, Cui and Meng, Yabin and Zhang, Zhihong and Li, Ya and Zhang, Qiqing
Journal: ACS applied materials & interfaces (2018): 26882-26892

Sensitive Detection of Polynucleotide Kinase Activity by Paper-Based Fluorescence Assay with λ Exonuclease Assistance.
Authors: Zhang, Hua and Zhao, Zhen and Lei, Zhen and Wang, Zhenxin
Journal: Analytical chemistry (2016): 11358-11363

Sensitive detection of histamine using fluorescently labeled oxido-reductases.
Authors: Gustiananda, Marsia and Andreoni, Alessio and Tabares, Leandro C and Tepper, Armand W J W and Fortunato, Luca and Aartsma, Thijs J and Canters, Gerard W
Journal: Biosensors & bioelectronics (2012): 419-25

Page updated on May 19, 2025

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Unit size	5 mg 1 mg
Catalog Number	90119012
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Physical properties

Molecular weight	945.04
Solvent	DMSO

Spectral properties

Correction Factor (260 nm)	0.02
Correction Factor (280 nm)	0.03
Correction Factor (482 nm)	0.009
Correction Factor (565 nm)	0.09
Extinction coefficient (cm ^-1 M ^-1)	250000¹
Excitation (nm)	651
Emission (nm)	670
Quantum yield	0.27¹, 0.4²

Storage, safety and handling

H-phrase	H303, H313, H333
Hazard symbol	XN
Intended use	Research Use Only (RUO)
R-phrase	R20, R21, R22
Storage	Freeze (< -15 °C); Minimize light exposure
UNSPSC	12171501