AZDye 568 NHS Ester

Unit Size
Price (USD)
Cat.#: 1081-1
Unit size: 1 mg
in stock
Cat.#: 1081-5
Unit size: 5 mg
in stock
Cat.#: 1081-25
Unit size: 25 mg
in stock
Cat.#: 1081-100
Unit size: 100 mg
in stock

AZDye™ 568 NHS Ester (Alexa Fluor 568 NHS Ester equivalent) is an amine-reactive, orange fluorescent dye routinely used to label proteins or antibodies through the primary amines (Lys), amine-modified oligonucleotides, and other amine-containing biomolecules. AZDye™ 568 dye can be used for proteins labeling at high molar ratios without significantself-quenching, enabling brighter conjugates and more sensitive detection.

AZDye™ 568 is a water-soluble, photostable, and bright orange dye with pH insensitive emission from pH 4 to pH 10. The excitation of AZDye™ 568 dye ideally suited for the 568 nm laser line on the Ar-Kr mixed-gas laser. AF™ 568 dye conjugated to a variety of antibodies, peptides, proteins, tracers, and amplification substrates often used for generation of stable signal in imaging and flow cytometry.

AZDye™ 568 NHS Ester is structurally identical to Alexa Fluor® 568 NHS Ester.

Primary amine
Abs/Em Maxima
578/602 nm
Extinction coefficient
88,000 cm-1M-1
Water, DMSO, DMF
Spectrally similar dyes
Alexa Fluor® 568, CF™ 568
Molecular weight
791.80 (protonated)
Storage conditions
Shipping conditions
Ambient temperature


Enter only one — either volume or amount of protein to be labeled
Enter only one — either maximum concentration of DMSO or volume DMSO added to label

Alexa Fluor® Dyes is a registered trademark of Invitrogen, part of Thermo Fisher Scientific. Fluoroprobes is not affiliated with or endorsed by Thermo Fisher Scientific. AZDyes are GENERIC versions of Alexa Fluor® Dyes and ARE NOT manufactured, distributed, or affiliated in any way with Thermo Fisher Scientific.