AAT Bioquest

Cy7.5 tetrazine

Product Image
Product Image
Gallery Image 1
Ordering information
Catalog Number
Unit Size
Add to cart
Additional ordering information
InternationalSee distributors
Bulk requestInquire
Custom sizeInquire
ShippingStandard overnight for United States, inquire for international
Request quotation
Physical properties
Molecular weight1429.88
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure


See also: Cyanines
Molecular weight
Cy7.5 tetrazine is a conjugate formed by attaching a tetrazine molecule to the Cy7.5 fluorophore. This conjugate is particularly valuable in bioorthogonal labeling strategies, where it can react selectively and rapidly with a complementary molecule containing TCO, a strained alkene (typically trans-cyclooctene) in a reaction known as the inverse electron-demand Diels-Alder (IEDDA) reaction. The IEDDA reaction between Cy7.5 tetrazine and a strained alkene group allows for specific and efficient labeling of biomolecules without interfering with native biological processes. This labeling method has gained popularity in biochemistry, cell biology, and imaging studies due to its bioorthogonal nature and compatibility with living systems. Cy7.5 tetrazine can provide a valuable infrared fluorescent tool for labeling and tracking specific molecules or structures of interest. Its IR fluorescence properties also make it suitable for deep tissue imaging applications.


Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of Cy7.5 tetrazine to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

0.1 mg0.5 mg1 mg5 mg10 mg
1 mM69.936 µL349.68 µL699.359 µL3.497 mL6.994 mL
5 mM13.987 µL69.936 µL139.872 µL699.359 µL1.399 mL
10 mM6.994 µL34.968 µL69.936 µL349.68 µL699.359 µL

Molarity calculator

Enter any two values (mass, volume, concentration) to calculate the third.

Mass (Calculate)Molecular weightVolume (Calculate)Concentration (Calculate)Moles

Product Family

NameExcitation (nm)Emission (nm)Extinction coefficient (cm -1 M -1)Quantum yieldCorrection Factor (260 nm)Correction Factor (280 nm)Correction Factor (482 nm)Correction Factor (565 nm)Correction Factor (650 nm)
Cy3.5 tetrazine5795911500000.150.080.178---
Cy5.5 tetrazine6837032500000.270.050.1010.00170.0470.454



View all 50 references: Citation Explorer
Acidic pH-Triggered Live-Cell Lysosome Specific Tracking, Ratiometric pH Sensing, and Multicolor Imaging by Visible to NIR Switchable Cy-7 Dyes.
Authors: Mukherjee, Ayan and Saha, Pranab Chandra and Kar, Samiran and Guha, Pampa and Das, Rabi Sankar and Bera, Tapas and Guha, Samit
Journal: Chembiochem : a European journal of chemical biology (2023): e202200641
Boosting Dye-Sensitized Luminescence by Enhanced Short-Range Triplet Energy Transfer.
Authors: Zhao, Fei and Hu, Jialing and Guan, Daoming and Liu, Jinyang and Zhang, Xuebo and Ling, Huan and Zhang, Yunxiang and Liu, Qian
Journal: Advanced materials (Deerfield Beach, Fla.) (2023): e2304907
Polymer Vesicles with Integrated Photothermal Responsiveness.
Authors: Luo, Yingtong and Wu, Hanglong and Zhou, Xuan and Wang, Jianhong and Er, Süleyman and Li, Yudong and Welzen, Pascal L W and Oerlemans, Roy A J F and Abdelmohsen, Loai K E A and Shao, Jingxin and van Hest, Jan C M
Journal: Journal of the American Chemical Society (2023): 20073-20080
Comparison of Five Near-Infrared Fluorescent Folate Conjugates in an Ovarian Cancer Model.
Authors: García de Jalón, Elvira and Kleinmanns, Katrin and Fosse, Vibeke and Davidson, Ben and Bjørge, Line and Haug, Bengt Erik and McCormack, Emmet
Journal: Molecular imaging and biology (2023): 144-155
Computational Design, Synthesis, and Photochemistry of Cy7-PPG, an Efficient NIR-Activated Photolabile Protecting Group for Therapeutic Applications.
Authors: Alachouzos, Georgios and Schulte, Albert M and Mondal, Anirban and Szymanski, Wiktor and Feringa, Ben L
Journal: Angewandte Chemie (International ed. in English) (2022): e202201308
Dual tumor- and subcellular-targeted photodynamic therapy using glucose-functionalized MoS2 nanoflakes for multidrug-resistant tumor ablation.
Authors: Xu, Shaohui and Zhang, Pan and Heing-Becker, Isabelle and Zhang, Junmei and Tang, Peng and Bej, Raju and Bhatia, Sumati and Zhong, Yinan and Haag, Rainer
Journal: Biomaterials (2022): 121844
PSMA-targeted NIR probes for image-guided detection of prostate cancer.
Authors: Cilibrizzi, Agostino and Wang, Julie Tzu-Wen and Memdouh, Siham and Iacovone, Antonella and McElroy, Kate and Jaffar, Noor and Young, Jennifer Denise and Hider, Robert C and Blower, Philip and Al-Jamal, Khuloud and Abbate, Vincenzo
Journal: Colloids and surfaces. B, Biointerfaces (2022): 112734
Fluorescent A2A and A3 adenosine receptor antagonists as flow cytometry probes.
Authors: Toti, Kiran S and Campbell, Ryan G and Lee, Hobin and Salmaso, Veronica and Suresh, R Rama and Gao, Zhan-Guo and Jacobson, Kenneth A
Journal: Purinergic signalling (2022)
A Raman/fluorescence dual-modal imaging guided synergistic photothermal and photodynamic therapy nanoplatform for precision cancer theranostics.
Authors: Fu, Lili and Huang, Yan and Hou, Junjun and Sun, Mingzhao and Wang, Lingxiao and Wang, Xiaoyan and Chen, Lingxin
Journal: Journal of materials chemistry. B (2022): 8432-8442
Reducing thermal damage to adjacent normal tissue with dual thermo-responsive polymer via thermo-induced phase transition for precise photothermal theranosis.
Authors: Wang, Rui and Wang, Xu and Mu, Xueluer and Feng, Wenbi and Lu, Yingxi and Yu, Weisong and Zhou, Xianfeng
Journal: Acta biomaterialia (2022): 142-151