Atto 740

BioReagent, suitable for fluorescence, ≥98.0% (HPCE)

MDL number:

Quality Level

product line



≥98.0% (HPCE)


λex 740 nm; λem 764 nm in 0.1 M phosphate pH 7.0


suitable for fluorescence

storage temp.


General description

Atto 740 is a new infrared label with high molecular absorption (120.000) and sufficient stoke′s shift between excitation and emission maximum. Atto 740 is characterized by high photostability and thermal stability. It is moderately soluble in water. ATTO 740 is a pH sensitive product. While practically stable at pH 7.4 (PBS Buffer), it slowly degrades at higher pH. After 7 hours at pH 8.25 (0.2 M sodiumbicarbonate buffer) 85% of the dye is retained.


QY=10%, Tfl 0.6 ns

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Sez-Jade Chen et al.
Journal of biophotonics, 12(3), e201800185-e201800185 (2018-11-14)
We introduce a simple new approach for time-resolved multiplexed analysis of complex systems using near-infrared (NIR) dyes, applicable to in vitro and in vivo studies. We show that fast and precise in vitro quantification of NIR fluorophores' short (subnanosecond) lifetime...
E Shane Price et al.
The journal of physical chemistry. B, 115(29), 9320-9326 (2011-06-22)
Fluorescence correlation spectroscopy (FCS) can be coupled with Förster resonance energy transfer (FRET) to detect intramolecular dynamics of proteins on the microsecond time scale. Here we describe application of FRET-FCS to detect fluctuations within the N-terminal and C-terminal domains of...
Tip-enhanced single molecule fluorescence near-field microscopy in aqueous environment.
Frey, H.G., et al.
Applied Physics Letters, 94, 241116-241116 (2009)
Scott B Raymond et al.
Journal of biomedical optics, 15(4), 046011-046011 (2010-08-31)
Near-infrared (NIR) fluorescence tomography of multiple fluorophores has previously been limited by the bandwidth of the NIR spectral regime and the broad emission spectra of most NIR fluorophores. We describe in vivo tomography of three spectrally overlapping fluorophores using fluorescence...
Zhiliang Cheng et al.
Bioconjugate chemistry, 22(10), 2021-2029 (2011-09-09)
Block copolymer-based vesicles have recently garnered a great deal of interest as nanoplatforms for drug delivery and molecular imaging applications due to their unique structural properties. These nanovesicles have been shown to direct their cargo to disease sites either through...

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service

Social Media

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon


Research. Development. Production.

We are a leading supplier to the global Life Science industry with solutions and services for research, biotechnology development and production, and pharmaceutical drug therapy development and production.

© 2021 Merck KGaA, Darmstadt, Germany and/or its affiliates. All Rights Reserved.

Reproduction of any materials from the site is strictly forbidden without permission.