iFluor® 555 TCO
Ordering information
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Additional ordering information
Telephone | 1-800-990-8053 |
Fax | 1-800-609-2943 |
sales@aatbio.com | |
International | See distributors |
Bulk request | Inquire |
Custom size | Inquire |
Shipping | Standard overnight for United States, inquire for international |
Physical properties
Molecular weight | 1236.49 |
Solvent | DMSO |
Spectral properties
Correction Factor (260 nm) | 0.23 |
Correction Factor (280 nm) | 0.14 |
Extinction coefficient (cm -1 M -1) | 1000001 |
Excitation (nm) | 557 |
Emission (nm) | 570 |
Quantum yield | 0.641 |
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 |
Overview | ![]() ![]() |
See also: iFluor® Dyes and Kits
Molecular weight 1236.49 | Correction Factor (260 nm) 0.23 | Correction Factor (280 nm) 0.14 | Extinction coefficient (cm -1 M -1) 1000001 | Excitation (nm) 557 | Emission (nm) 570 | Quantum yield 0.641 |
The tetrazine-trans-cyclooctene (TCO) ligation constitutes a non-toxic biomolecule labeling method of unparalleled speed. A tetrazine-functionalized molecule reacts with a TCO-functionalized molecule, forming a stable conjugate via a dihydropyrazine moiety. This has gained popularity due to its extremely fast kinetics. AAT Bioquest offers a group of tetrazine- and TCO-containing dyes for exploring various biological systems that can use this powerful click reaction. iFluor® 555-TCO can be readily used to label tetrazine-modified biological molecules for fluorescence imaging and other fluorescence-based biological applications. The peptide and oligo conjugates prepared with iFluor® 555 dye are far superior to the conjugates of other spectrally similar dyes, such as the popular Cy3 and Alexa Fluor® 555. iFluor® 555 conjugates are significantly brighter and much more photostable than the corresponding conjugates of Cy3 and Alexa Fluor® 555 (Alexa Fluor® is the trademark of Invitrogen).
Calculators
Common stock solution preparation
Table 1. Volume of DMSO needed to reconstitute specific mass of iFluor® 555 TCO to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.
0.1 mg | 0.5 mg | 1 mg | 5 mg | 10 mg | |
1 mM | 80.874 µL | 404.37 µL | 808.741 µL | 4.044 mL | 8.087 mL |
5 mM | 16.175 µL | 80.874 µL | 161.748 µL | 808.741 µL | 1.617 mL |
10 mM | 8.087 µL | 40.437 µL | 80.874 µL | 404.37 µL | 808.741 µL |
Molarity calculator
Enter any two values (mass, volume, concentration) to calculate the third.
Mass (Calculate) | Molecular weight | Volume (Calculate) | Concentration (Calculate) | Moles | ||||
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Spectrum
Open in Advanced Spectrum Viewer


Spectral properties
Correction Factor (260 nm) | 0.23 |
Correction Factor (280 nm) | 0.14 |
Extinction coefficient (cm -1 M -1) | 1000001 |
Excitation (nm) | 557 |
Emission (nm) | 570 |
Quantum yield | 0.641 |
Product Family
Name | Excitation (nm) | Emission (nm) | Extinction coefficient (cm -1 M -1) | Quantum yield | Correction Factor (260 nm) | Correction Factor (280 nm) |
iFluor® 555 maleimide | 557 | 570 | 1000001 | 0.641 | 0.23 | 0.14 |
iFluor® 555 amine | 557 | 570 | 1000001 | 0.641 | 0.23 | 0.14 |
iFluor® 555 hydrazide | 557 | 570 | 1000001 | 0.641 | 0.23 | 0.14 |
iFluor® 555 alkyne | 557 | 570 | 1000001 | 0.641 | 0.23 | 0.14 |
iFluor® 555 azide | 557 | 570 | 1000001 | 0.641 | 0.23 | 0.14 |
iFluor® 555 Styramide *Superior Replacement for Alexa Fluor 555 tyramide and Opal 570* | 557 | 570 | 1000001 | 0.641 | 0.23 | 0.14 |
iFluor® 555 Tyramide | 557 | 570 | 1000001 | 0.641 | 0.23 | 0.14 |
iFluor® 488 TCO | 491 | 516 | 750001 | 0.91 | 0.21 | 0.11 |
iFluor® 594 TCO | 588 | 604 | 1800001 | 0.531 | 0.05 | 0.04 |
Show More (2) |
Images

Figure 1. The tetrazine-trans-cyclooctene (TCO) ligation constitutes a non-toxic biomolecule labeling method of unparalleled speed. A tetrazine-functionalized molecule reacts with a TCO-functionalized molecule, forming a stable conjugate via a dihydropyrazine moiety. This has gained popularity due to its extremely fast kinetics. iFluor® 555 TCO can be readily used to label tetrazine-modified biological molecules for fluorescence imaging and other fluorescence-based biochemical analysis.
References
View all 50 references: Citation Explorer
Novel Fluorescent Labeled Octasilsesquioxanes Nanohybrids as Potential Materials for Latent Fingerprinting Detection.
Authors: O Dare, Enock and Vendrell-Criado, Victoria and Jiménez, M Consuelo and Perez-Ruiz, Raúl and Díaz Díaz, David
Journal: Chemistry (Weinheim an der Bergstrasse, Germany) (2020)
Authors: O Dare, Enock and Vendrell-Criado, Victoria and Jiménez, M Consuelo and Perez-Ruiz, Raúl and Díaz Díaz, David
Journal: Chemistry (Weinheim an der Bergstrasse, Germany) (2020)
Fluorescent bioorthogonal labeling of class B GPCRs in live cells.
Authors: Gangam, Srikanth Kumar and Lin, Qing
Journal: Methods in enzymology (2020): 95-111
Authors: Gangam, Srikanth Kumar and Lin, Qing
Journal: Methods in enzymology (2020): 95-111
Bond-Breaking Bio-orthogonal Chemistry Efficiently Uncages Fluorescent and Therapeutic Compounds under Physiological Conditions.
Authors: Wu, Xunshen and Wu, Kui and Gaye, Fatima and Royzen, Maksim
Journal: Organic letters (2020): 6041-6044
Authors: Wu, Xunshen and Wu, Kui and Gaye, Fatima and Royzen, Maksim
Journal: Organic letters (2020): 6041-6044
Fluorescent Janus emulsions for biosensing of Listeria monocytogenes.
Authors: Li, Jie and Savagatrup, Suchol and Nelson, Zachary and Yoshinaga, Kosuke and Swager, Timothy M
Journal: Proceedings of the National Academy of Sciences of the United States of America (2020): 11923-11930
Authors: Li, Jie and Savagatrup, Suchol and Nelson, Zachary and Yoshinaga, Kosuke and Swager, Timothy M
Journal: Proceedings of the National Academy of Sciences of the United States of America (2020): 11923-11930
Conjugable A3 adenosine receptor antagonists for the development of functionalized ligands and their use in fluorescent probes.
Authors: Federico, Stephanie and Margiotta, Enrico and Moro, Stefano and Kozma, Eszter and Gao, Zhan-Guo and Jacobson, Kenneth A and Spalluto, Giampiero
Journal: European journal of medicinal chemistry (2020): 111886
Authors: Federico, Stephanie and Margiotta, Enrico and Moro, Stefano and Kozma, Eszter and Gao, Zhan-Guo and Jacobson, Kenneth A and Spalluto, Giampiero
Journal: European journal of medicinal chemistry (2020): 111886
Metabolic phospholipid labeling of intact bacteria enables a fluorescence assay that detects compromised outer membranes.
Authors: Nilsson, Inga and Lee, Sheng Y and Sawyer, William S and Baxter Rath, Christopher M and Lapointe, Guillaume and Six, David A
Journal: Journal of lipid research (2020): 870-883
Authors: Nilsson, Inga and Lee, Sheng Y and Sawyer, William S and Baxter Rath, Christopher M and Lapointe, Guillaume and Six, David A
Journal: Journal of lipid research (2020): 870-883
Optimizing the Biodistribution of Radiofluorinated Barbiturate Tracers for Matrix Metalloproteinase Imaging by Introduction of Fluorescent Dyes as Pharmacokinetic Modulators.
Authors: Schwegmann, Katrin and Hohn, Michael and Hermann, Sven and Schäfers, Michael and Riemann, Burkhard and Haufe, Günter and Wagner, Stefan and Breyholz, Hans-Jörg
Journal: Bioconjugate chemistry (2020): 1117-1132
Authors: Schwegmann, Katrin and Hohn, Michael and Hermann, Sven and Schäfers, Michael and Riemann, Burkhard and Haufe, Günter and Wagner, Stefan and Breyholz, Hans-Jörg
Journal: Bioconjugate chemistry (2020): 1117-1132
Synthesis and Characterization of Heterodimers and Fluorescent Nisin Species by Incorporation of Methionine Analogs and Subsequent Click Chemistry.
Authors: Deng, Jingjing and Viel, Jakob H and Chen, Jingqi and Kuipers, Oscar P
Journal: ACS synthetic biology (2020)
Authors: Deng, Jingjing and Viel, Jakob H and Chen, Jingqi and Kuipers, Oscar P
Journal: ACS synthetic biology (2020)
Ultra-fast Cycling for Multiplexed Cellular Fluorescence Imaging.
Authors: Ko, Jina and Oh, Juhyun and Ahmed, Maaz S and Carlson, Jonathan C T and Weissleder, Ralph
Journal: Angewandte Chemie (International ed. in English) (2020): 6839-6846
Authors: Ko, Jina and Oh, Juhyun and Ahmed, Maaz S and Carlson, Jonathan C T and Weissleder, Ralph
Journal: Angewandte Chemie (International ed. in English) (2020): 6839-6846
Color-Tunable Light-up Bioorthogonal Probes for In Vivo Two-Photon Fluorescence Imaging.
Authors: Dou, Yandong and Wang, Yajun and Duan, Yukun and Liu, Bin and Hu, Qinglian and Shen, Wei and Sun, Hongyan and Zhu, Qing
Journal: Chemistry (Weinheim an der Bergstrasse, Germany) (2020): 4576-4582
Authors: Dou, Yandong and Wang, Yajun and Duan, Yukun and Liu, Bin and Hu, Qinglian and Shen, Wei and Sun, Hongyan and Zhu, Qing
Journal: Chemistry (Weinheim an der Bergstrasse, Germany) (2020): 4576-4582
Application notes
A Meta-Analysis of Common Calcium Indicators
A New Protein Crosslinking Method for Labeling and Modifying Antibodies
A Novel Fluorescent Probe for Imaging and Detecting Hydroxyl Radical in Living Cells
A Novel NO Wash Probeniceid-Free Calcium Assay for Functional Analysis of GPCR and Calcium Channel Targets
Abbreviation of Common Chemical Compounds Related to Peptides
A New Protein Crosslinking Method for Labeling and Modifying Antibodies
A Novel Fluorescent Probe for Imaging and Detecting Hydroxyl Radical in Living Cells
A Novel NO Wash Probeniceid-Free Calcium Assay for Functional Analysis of GPCR and Calcium Channel Targets
Abbreviation of Common Chemical Compounds Related to Peptides
FAQ
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