MAN0003555 	 Revised: 6–May–2012  |  MP 10422
Table 1 Contents and storage
Material Catalog no. Amount Excitation/Emission Concentration Storage*
CellROX® Deep Red Reagent C10422
5 × 50 μL
640/665 nm (Deep Red)
2.5 mM stabilized
solution in DMSO
•	 ≤–20°C
•	 Protect from light
•	 Desiccate
CellROX® Orange Reagent C10443 545/565 (Orange)
CellROX® Green Reagent C10444 485/520 (Green)
CellROX® Variety Pack C10448
1 × 50 μL CellROX® Deep Red Reagent
1 × 50 μL CellROX® Orange Reagent
1 × 50 μL CellROX® Green Reagent
*When stored as directed, the product is stable for 6 months from the date of receipt.
CellROX® Oxidative Stress Reagents
Catalog nos. C10422, C10443, C10444, C10448
Introduction
CellROX® Oxidative Stress Reagents are fluorogenic probes designed to reliably measure
reactive oxygen species (ROS) in live cells. The cell-permeable reagents are non-fluorescent
or very weakly fluorescent while in a reduced state and upon oxidation exhibit strong
fluorogenic signal. CellROX® Green Reagent is a DNA dye, and upon oxidation, it binds to
DNA; thus, its signal is localized primarily in the nucleus and mitochondria. In contrast,
the signals from CellROX® Deep Red and CellROX® Orange Reagents are localized in the
cytoplasm. The fluorescence resulting from CellROX® Oxidative Stress Reagents can be
measured using traditional fluorescence microscopy, high-content imaging and analysis,
microplate fluorometry, or flow cytometry. These reagents can be detected using the
appropriate benchtop instrument such as the Attune® Acoustic Focusing Cytometer, Tali®
Image-based Cytometer, and FLoid™ Cell Imaging Station (See Table 2, page 2).
The staining workflow is simple (Figure 2, page 2), and the reagent can be applied to cells
in complete growth medium or buffer. All of the CellROX® Oxidative Stress Reagents are
very photostable when compared to traditional ROS detection dyes. In addition, some of
the reagents retain their signal after formaldehyde fixation and detergent permeabilization
(Table 2, page 2), allowing for assay flexibility and improved workflows compared to those
based on classic dyes for ROS detection.
CellROX® Oxidative Stress Reagents specifically detect ROS as shown by inhibition of
menadione-induced ROS in endothelial cells (Figure 3, page 3). These probes have been
used to evaluate ROS generated by various agents, including lipopolysaccharide, menadione,
angiotensin II, and nefazodone in several different live-cell models.
CellROX® Oxidative Stress Reagents  |  2
CellROX®
Deep
Red Reagent
CellROX®
Orange
Reagent
CellROX®
Green
Reagent
H2-DCFDA*
Dihydroethidium
(DHE)
Live cell compatible Yes Yes Yes Yes Yes
Labeling in complete medium Yes Yes Yes No Yes
Formaldehyde fixable Yes No Yes No No
Detergent resistant No No Yes No No
Compatible platforms
•	 Imaging
•	 HCS†
•	 HTS‡
•	 Flow cytometry
•	 Attune® Acoustic
Focusing
Cytometer
•	 Imaging
•	 HCS
•	 Flow cytometry
•	 Tali® Image-based
Cytometer
•	 Imaging
•	 HCS
•	 HTS
•	 Flow cytometry
•	 Tali® Image-based
Cytometer
•	 FLoid™ Cell
Imaging Station
•	 Attune® Acoustic
Focusing
Cytometer
•	 Imaging
•	 HCS
•	 HTS
•	 Flow cytometry
•	 FLoid™ Cell
Imaging Station
•	 Imaging
•	 HCS
* H2-DCFDA: Dihdyrodichlorofluorescein, diacetate; † High-content screening; ‡ High-throughput screening.
Table 2 Comparison between ROS detection methods
Figure 1 Fluorescence excitation and emission spectra of the oxidized CellROX® Oxidative Stress Reagents. (A) CellROX® Deep Red Reagent, (B) CellROX® Orange
Reagent, (C) CellROX® Green Reagent.
400 450 500 550 600 650 700
Wavelength (nm)
Intensity
Peak emissionPeak excitation
C
400 450 500 550 600 650 700
Wavelength (nm)
Intensity
Peak emissionPeak excitationB
500 550 600 650 700
Wavelength (nm)
Intensity
750 800
Peak emissionPeak excitationA
Figure 2 Workflow for CellROX® Oxidative Stress Reagents.
Plate cells • Add CellROX®
Reagent
and optional live cell nuclear
reagents (e.g.,NucBlue™
/
Hoechst 33342)
• Incubate for 30 minutes
Wash cells 1–3X in PBSOptional drug treatment
Analyze
FLoid™
Cell Imaging
Station
Tali®
Image-based
Cytometer
Attune®
Acoustic Focusing
Cytometer/Flow Cytometry
High Content Screening
Traditional Fluorescence
Microscopy
CellROX® Oxidative Stress Reagents  |  3
0
50
100
150
200
250
300
350
400
450
Control Menadione
Control + MnTBAP Menadione + MnTBAP
Meansignalintensity 0
50
100
150
200
250
300
350
400
450
Figure 3 Quantitation and statistical analysis of oxidative stress based on staining with CellROX® Oxidative Stress Reagents (***a = The values are significantly
different from controls with P ≤ 0.0001 ; ***b = values were significantly different from drug treated cells with P ≤ 0.0001).
(A) CellROX® Deep Red Reagent. Bovine pulmonary artery endothelial (BPAE) cells were plated in a 96-well plate. The cells were treated with or without 100 μM of
menadione for 1 hour at 37°C. 100 μM of superoxide scavenger, MnTBAP, was added to some of the control and menadione-treated wells for the last 30 minutes
of incubation. The cells were then stained with 5 μM of CellROX® Deep Red Reagent and Hoechst 33324 by adding the probe to the complete medium and
incubating the cells at 37°C for 30 minutes. The cells were then washed with PBS and analyzed on a Thermo Fisher Cellomics ArrayScan® VTI.
A
1
0
50
100
150
200
250
300
350
400
Control Menadione
Control + NAC Menadione + NAC
***a
***b
B
C
0
50
100
150
200
250
300
350
***b
350
0
50
100
150
200
250
300
Meansignalintensity
Control THBP
Control + Ebselen THBP + Ebselen
***a
(B) CellROX® Orange Reagent. Bovine pulmonary artery endothelial (BPAE) cells were plated in 96-well plates. The cells were treated with or without 200 µM of tertbutyl
hydroperoxide (TBHP) for 2 hours at 37°C. 10 µM of ebselen was added to some of the control and TBHP-treated wells. The cells were then stained with 5 µM
of CellROX® Orange Reagent and Hoechst 33342 by adding the probe to the complete medium and incubating the cells at 37°C for 30 minutes. The cells were then
washed with PBS and analyzed on a Thermo Fisher Cellomics ArrayScan® VTI. Ebselen treatment inhibited ROS caused by TBHP, confirming that the signal was due to
ROS induced by the compound.
(C) CellROX® Green Reagent. Bovine pulmonary artery endothelial (BPAE) cells were plated on glass bottom 35-mm MaTtek dishes. BPAE cells were treated with
or without 100 µM menadione for 1 hour at 37°C. 50 µM N-acetyl cysteine was added to some of the control and menadione-treated wells. The cells were then
stained with 5 µM CellROX® Orange Reagent and Hoechst 33342 by adding the probe to the complete media and incubating at 37°C for 30 minutes. The cells were
then washed with PBS and then imaged on a Zeiss Axiovert inverted microscope using a 40X objective. N-acetyl cysteine treatment inhibited ROS caused by TBHP,
confirming that the signal was due to ROS induced by the compound.
CellROX® Oxidative Stress Reagents  |  4
Before Starting
Materials required but
not provided •	 Cells and culture medium
•	 Phosphate buffered saline (PBS, pH 7.2–7.6)
•	 Optional: Fixative (i.e., 3.7% formaldehyde in PBS)
•	 Optional: Permeabilization solution (i.e., 0.5% Triton® X-100)
Caution DMSO is known to facilitate the entry of organic molecules into tissues. Handle reagents
containing DMSO using equipment and practices appropriate for the hazards posed by such
materials. Dispose of the reagents in compliance with all pertaining local regulations. In case
of contact with eyes, rinse immediately with plenty of water and seek medical advice. Always
wear suitable laboratory protective clothing and gloves when handling this reagent.
Experimental Protocols
The following protocol was developed with BPAE, HepG2, U-2 OS, and RAW microphage
cells with an optimized CellROX® Reagent concentration of 5 μM, but the assay can be
adapted for any cell type. Growth medium, cell density, cell type variations, and other factors
may influence labeling. In initial experiments, we recommend testing a concentration range
of the reagent to determine the optimal experimental conditions and the concentration for
your cell type.
The CellROX® Reagents are sensitive to exposure to light and air; care should be taken not
to keep the vials open for long periods of time. Discard any unused material once the vial is
opened.
CellROX® Reagent Staining and
Detection Following protocol for staining cells can be adapted for CellROX® Deep Red, CellROX®
Orange, and CellROX® Green Reagents, but specific conditions should be determined
separately for each reagent.
1.	 Treat the cells with the test compound or drug and incubate for the recommended time.
Note: You do not need to remove the medium after test compound or drug treatment.
2.	 Add the CellROX® Reagent at a final concentration of 5 μM to the cells and incubate for
30 minutes at 37°C.
3. 	 Remove medium and wash cells three times with PBS.
4.	 Optional: If you are using the CellROX® Deep Red or the CellROX® Green Reagent, you
can preserve the cells with a formaldehyde-based fixative at this stage. Fixation with 3.7%
formaldehyde for 15 minutes is recommended. Analyze the signal within 24 hours for the
CellROX® Green Reagent and within 2 hours for the CellROX® Deep Red Reagent.
Note: You can use the Live Cell Imaging Solution (Cat. no A14291DJ) to keep the cells
healthier during analysis with longer duration.
CellROX® Oxidative Stress Reagents  |  5
5.	 Optional: You can stain the cells with NucBlue™ Live Cell Stain, a nuclear counterstain, or
another counterstain at this time.
6.	 Optional: If you are using the CellROX® Green Reagent, you can permeabilize the cells with
0.5% Triton® X-100 for 10 minutes, if cell permeabilization is required for multiplexing with
another reagent.
Alternatively, you can use the Image-iT® Fixation/Permeabilization Kit (Cat. no. R37602) to
fix and permealize the cells.
References
1. Trends Biochem Sci 35, 505 (2010); 2. Oxid Med Cell Longev 2, 259 (2010); 3. Free Rad Res 10, 1239 (2010).
Product List 	Current prices may be obtained at www.invitrogen.com or from our Customer Service Department.
Catalog no. Product Name Unit Size
C10422 CellROX® Deep Red Reagent *for oxidative stress detection* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5 × 50 μL
C10443 CellROX® Orange Reagent *for oxidative stress detection* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5 × 50 μL
C10444 CellROX® Green Reagent *for oxidative stress detection* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5 × 50 μL
C10448 CellROX® Reagent Variety Pack *for oxidative stress detection* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1 kit
Related Products
A14291DJ Live Cell Imaging Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  500 mL
C10423 CellEvent® Caspase-3/7 Green Detection Reagent *2 mM solution in DMSO* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  100 μL
C6827 CM-H2DCFDA (5-(and-6)-chloromethyl- 2’,7’-dichlorodihydrofluorescein diacetate, acetyl ester) *mixed isomers*
*special packaging*  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5 × 50 μg
D399 H2DCFDA (2’,7’-dichlorodihydrofluorescein diacetate (2’,7’-dichlorofluorescin diacetate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  100 mg
D11347 dihydroethidium (hydroethidine) *special packaging* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10 × 1 mg
D23844 DAF-FM diacetate (4-amino-5-methylamino- 2’,7’-difluorofluorescein diacetate) *special packaging* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 × 50 mg
I10291 Image-iT® DEAD Green™ viability stain  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25 μL
I36007 Image-iT® LIVE Green Reactive Oxygen Species Detection Kit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1 kit
M36008 MitoSOX® Red mitochondrial superoxide indicator *for live-cell imaging*  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5 × 50 μg
T10096 ThiolTracker™ Violet (Glutathione Detection Reagent) *for 5 microplates* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  each
R37602 Image-iT® Fixation/Permeabilization Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1 kit
R37603 BackDrop™ Background Suppressor *for live cells* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1 kit
R37605 NucBlue™ Live Cell Stain *Hoechst 33342 special formulation* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1 kit
R37606 NucBlue™ Fixed Cell Stain *DAPI special formulation* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1 kit
Related Platforms
Attune® Acoustic Focusing Cytometer
(Cat. no. 4469120)
Tali® Image-based Cytometer
(Cat. no. T10796)
FLoid™ Cell Imaging Station
(Cat. no. 4471136)
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