Alexa Fluor® 594 dyeInvitrogen Alexa Fluor 594 dye is a bright, red-fluorescent dye that can be excited using the 561 nm or 594 nm laser lines. For stable signal generation in imaging and flow cytometry, Alexa Fluor 594 dye is pH-insensitive over a wide molar range.

Probes with high fluorescence quantum yield and high photostability allow detection of low-abundance biological structures with great sensitivity. Alexa Fluor 594 dye molecules can be attached to proteins at high molar ratios without significant self-quenching, enabling brighter conjugates and more sensitive detection.

We offer Alexa Fluor 594 dye conjugated to a variety of antibodies, peptides, proteins, tracers, and amplification substrates optimized for cellular labeling and detection. In addition, reactive dye forms and protein labeling kits are available to allow you to generate your own antibody conjugates or probes.

Alexa Fluor 594 dye dashboard

Initial brightness

Direct replacement for Invitrogen Texas Red dye with bright signal and excellent photostability, especially in fixed cells; commonly used with Invitrogen Alexa Fluor 350, 488, and 647 dyes for multiplexing. In addition, is used in a range of SRM applications including dSTORM, SIM, and STED and in two-photon excitation (TPE) microscopy.  

Photostability in buffer


Photostability in antifade


Performance in SRM


  561/594 Texas Red 590 617  
Laser line

Common filter set

Excitation max

Emission max


Alexa Fluor® 594 dye

Microtubules of fixed bovine pulmonary artery endothelial cells were visualized with mouse monoclonal anti–α-tubulin antibody, followed by an Alexa Fluor 350 goat anti–mouse IgG antibody. Next, the F-actin was labeled with Alexa Fluor 594 phalloidin. Finally, the cells were incubated with Alexa Fluor 488 wheat germ agglutinin to stain components of endosomal pathways. The superimposed and pseudocolored images were acquired sequentially using bandpass filter sets appropriate for DAPI, Texas Red dye, and fluorescein, respectively.

Alexa Fluor 594 reactive dyes

Select dye-labeling chemistries for conjugation with the following reactive groups: 

Amine Thiol Aldehyde, ketone, carboxylate, or phosphate Click reaction

Alexa Fluor 594 protein/antibody labeling kits

Select an optimized labeling kit for your target antibody or protein:

Target protein Kit Cat. No.
Site-specific antibody labeling
<1–20 µg mouse IgG1 Zenon Alexa Fluor 594 Mouse IgG1 Labeling Kit Z25007
<1–20 µg mouse IgG2a Zenon Alexa Fluor 594 Mouse IgG2a Labeling Kit Z25107
<1–20 µg mouse IgG2b Zenon Alexa Fluor 594 Mouse IgG2b Labeling Kit Z25207
<1–20 µg human IgG Zenon Alexa Fluor 594 Human IgG Labeling Kit Z25407
<1–20 µg rabbit IgG Zenon Alexa Fluor 594 Rabbit IgG Labeling Kit Z25307
Conventional antibody/protein labeling
10–20 µg antibody APEX Alexa Fluor 594 Antibody Labeling Kit A10474
20–100 µg antibody/protein Alexa Fluor 594 Microscale Antibody/Protein Labeling Kit A30008
100 µg antibody/protein Alexa Fluor 594 Antibody/Protein Labeling Kit A20185
1 mg antibody/protein Alexa Fluor 594 Antibody/Protein Labeling Kit A10239
Alexa Fluor Dye stained cell

Alexa Fluor dye family

Alexa Fluor dyes are among the most trusted fluorescent dyes available today. Learn more about the:

Not for resale. Super Bright Polymer Dyes are sold under license from Becton, Dickinson and Company.