Atto 550 NHS ester

BioReagent, suitable for fluorescence, ≥80% (coupling to amines)

MDL number:

Quality Level

product line



≥80% (coupling to amines)


λex 554 nm; λem 576 nm in 0.1 M phosphate pH 7.0


suitable for fluorescence

storage temp.



Atto fluorescent labels are designed for high sensitivity applications, including single molecule detection. Atto labels have rigid structures that do not show any cis-trans-isomerization. Thus these labels display exceptional intensity with minimal spectral shift on conjugation. Atto 550 NHS ester is a reagent used to label molecules such as proteins with the Atto 550 fluorescence probe. This probe may be used in the design of fluoresence resonance transfer (FRET) detection systems.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Andriy Mokhir et al.
Inorganic chemistry, 44(16), 5661-5666 (2005-08-03)
A concept of fluorescent metal ion sensing with an easily tunable emission wavelength is presented and its principle demonstrated by detection of Cu(2+). A fluorescein dye was chemically modified with a metal chelating group and then attached to the terminus...
Smart-aggregation imaging for single molecule localization with SPAD cameras.
Gyongy, I.; et al.
arXiv (2016)
Modeling colitis-associated cancer with azoxymethane (AOM) and dextran sulfate sodium (DSS).
Thaker AI, Shaker A, Rao MS, Ciorba MA.
Journal of Visualized Experiments (2012)
Thorben Cordes et al.
Physical chemistry chemical physics : PCCP, 13(14), 6699-6709 (2011-02-12)
Modern fluorescence microscopy applications go along with increasing demands for the employed fluorescent dyes. In this work, we compared antifading formulae utilizing a recently developed reducing and oxidizing system (ROXS) with commercial antifading agents. To systematically test fluorophore performance in...
Sandeep Kumar Vashist
Analytical biochemistry, 421(1), 336-338 (2011-11-19)
A surface plasmon resonance (SPR)-based procedure was developed to determine the effect of antibody modifications on its biomolecular binding behavior. Mouse immunoglobulin G (IgG) was immobilized on a protein A-functionalized gold-coated SPR chip. Goat anti-mouse IgG and its various commercially...
Fluorescent Labeling of Peptides
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