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ATTO 532 TCO

Product key features

  • Ex/Em: 531/552 nm
  • Extinction coefficient: 115,000 cm-1M-1
  • Reactive group: TCO
  • Click Chemistry: enables copper-free, bioorthogonal labeling of tetrazine-modified biomolecules
  • High Quantum Yield & Photostability: ensures intense signal for reliable detection and imaging
  • Excellent Hydrophilicity: Prevents aggregation and enhances signal clarity in live-cell applications
  • Advanced Imaging Performance: Suitable for single-molecule detection and super-resolution techniques, including SIM and STED

Product description

ATTO 532 is a rhodamine-based fluorescent dye notable for its high molar absorptivity and fluorescence quantum yield (0.90), providing robust signal intensity in fluorescence applications. Its combination of photostability, aqueous solubility, and sufficient Stokes shift makes it suitable for single-molecule detection and high-resolution microscopy techniques, including SIM and STED microscopy. ATTO 532 is also effective in flow cytometry, FISH, and a variety of biological assays, offering flexibility for diverse fluorescence-based experimental protocols. The dye is optimally excited within the 515-545 nm range, with a frequency-doubled Nd:YAG laser at 532 nm serving as an ideal excitation source.

ATTO 532 TCO is particularly useful for labeling tetrazine-modified biomolecules under copper-free conditions. It reacts with tetrazine-functionalized molecules, forming a stable conjugate via a dihydropyrazine moiety. This click reaction is favored over others due to its extremely fast kinetics and higher yields under mild reaction conditions, making it a popular choice for researchers.

Spectrum

References

View all 7 references: Citation Explorer
The new live imagers MitoMM1/2 for mitochondrial visualization.
Authors: Maeda, Miwa and Suzuki, Mayu and Takashima, Shigeo and Sasaki, Tsutomu and Oh-Hashi, Kentaro and Takemori, Hiroshi
Journal: Biochemical and biophysical research communications (2021): 50-54
DNA-templated control of chirality and efficient energy transport in supramolecular DNA architectures with aggregation-induced emission.
Authors: Ucar, Hülya and Wagenknecht, Hans-Achim
Journal: Chemical science (2021): 10048-10053
Endoplasmic reticulum phospholipid scramblase activity revealed after protein reconstitution into giant unilamellar vesicles containing a photostable lipid reporter.
Authors: Mathiassen, Patricia P M and Menon, Anant K and Pomorski, Thomas Günther
Journal: Scientific reports (2021): 14364
Importance of probe design for bioanalysis of oligonucleotides using hybridization-based LC-fluorescence assays.
Authors: Ji, Yuhuan and Liu, Yijiang and Xia, Wanhong and Behling, Alexander and Meng, Min and Bennett, Patrick and Wang, Laixin
Journal: Bioanalysis (2019): 1917-1925
The effect of local dynamics of Atto 390-labeled lysozyme on fluorescence anisotropy modeling.
Authors: Babcock, Jeremiah J and Brancaleon, Lorenzo
Journal: Biopolymers (2015): 285-95
Page updated on March 31, 2025

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Catalog Number2866
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Physical properties

Molecular weight

955.20

Solvent

DMSO

Spectral properties

Correction Factor (260 nm)

0.22

Correction Factor (280 nm)

0.11

Extinction coefficient (cm -1 M -1)

115000

Excitation (nm)

531

Emission (nm)

552

Quantum yield

0.90

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
UNSPSC12352200
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