zFluor™ 633 succinimidyl ester

Our zFluor™ serial dyes are developed to have the possibly highest photostability at a given wavelength compared to the other similar wavelength dyes on the market. zFluor™ 633 has almost identical spectral properties to ATTO 633, ATTO 635 and Alexa Fluor® 633 (ThermoFisher). Its high thermal and photostability makes it an excellent choice for single-molecule detection applications and high-resolution microscopy such as PALM, dSTORM and STED. Under the same test conditions, zFluor™ 633 has much higher ozone stability, making it a much better choice for microarray and other biochip-based applications. In addition, zFluor™-labeled oligonucleotides and peptides are much brighter and more photostable than the ones labeled by Alexa Fluor® 647 and Cy5®. This feature is extremely useful for fluorescence in-situ hybridization (FISH). In common with our iFluor® labels, the absorption and fluorescence of our zFluor™ 633 are independent of pH in the range of pH 2 to 11. It is well excited at 633 nm of He-Ne laser, the 633 nm line of the He-Ne laser.

<p>Fluorescent dye NHS esters (or succinimidyl esters) are the most popular tool for conjugating dyes to a peptide, protein, antibody, amino-modified oligonucleotide or nucleic acid. NHS esters react readily with the primary amines (R-NH<sub>2</sub>) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The resulting dye conjugates are quite stable.</p>

Protocol

SDS

COA

Catalog	Size	Price	Quantity
1510	1 mg	Price

Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of zFluor™ 633 succinimidyl ester 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	85.96 µL	429.801 µL	859.601 µL	4.298 mL	8.596 mL
5 mM	17.192 µL	85.96 µL	171.92 µL	859.601 µL	1.719 mL
10 mM	8.596 µL	42.98 µL	85.96 µL	429.801 µL	859.601 µL

Molarity calculator

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

Mass (Calculate)		Molecular weight		Volume (Calculate)		Concentration (Calculate)		Moles
mg	÷	1163.33 g/mol	=	mL	x	mM	=	mmol

References

View all 19 references: Citation Explorer

Single nucleotide polymorphism discrimination with and without an ethidium bromide intercalator

Authors:

Fenati, R. A.; Connolly, A. R.; Ellis, A. V.

Journal:

Anal Chim Acta (2017): 121-128

Generation and Characterization of Virus-Enhancing Peptide Nanofibrils Functionalized with Fluorescent Labels

Authors:

Rode, S.; Hayn, M.; Rocker, A.; Sieste, S.; Lamla, M.; Markx, D.; Meier, C.; Kirchhoff, F.; Walther, P.; F and rich, M.; Weil, T.; Munch, J.

Journal:

Bioconjug Chem (2017): 1260-1270

Capillary-Driven Microfluidic Chips for Miniaturized Immunoassays: Patterning Capture Antibodies Using Microcontact Printing and Dry-Film Resists

Authors:

Temiz, Y.; Lovchik, R. D.; Delamarche, E.

Journal:

Methods Mol Biol (2017): 37-47

Background Suppression in Imaging Gold Nanorods through Detection of Anti-Stokes Emission

Authors:

Carattino, A.; Keizer, V. I.; Schaaf, M. J.; Orrit, M.

Journal:

Biophys J (2016): 2492-2499

Absolute two-photon excitation spectra of red and far-red fluorescent probes

Authors:

Velasco, M. G.; Allgeyer, E. S.; Yuan, P.; Grutzendler, J.; Bewersdorf, J.

Journal:

Opt Lett (2015): 4915-8

Physical properties

Molecular weight	1163.33
Solvent	DMSO

Spectral properties

Excitation (nm)	623
Emission (nm)	639

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

Documents

Protocol
Safety Data Sheet
Certificate of Analysis

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Page updated on October 27, 2025