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ROS Brite™ HPF
Optimized for Detecting Reactive Oxygen Species (ROS)
Reactive oxygen species (ROS) are chemically reactive molecules containing oxygen. Examples include superoxide, hydroxyl radical, singlet oxygen and peroxides. ROS is highly reactive due to the presence of unpaired valence shell electrons. ROS forms as a natural byproduct of the normal metabolism of oxygen and have important roles in cell signaling and homeostasis. However, during times of environmental stress (e.g., UV or heat exposure), ROS levels can increase dramatically. This may result in significant damage to cell structures. Cumulatively, this is known as oxidative stress. ROS are also generated by exogenous sources such as ionizing radiation. Under conditions of oxidative stress, ROS production is dramatically increased, resulting in subsequent alteration of membrane lipids, proteins, and nucleic acids. Oxidative damage of these biomolecules is associated with aging as well as with a variety of pathological events, including atherosclerosis, carcinogenesis, ischemic reperfusion injury, and neurodegenerative disorders. ROS Brite™ HPF is a fluorogenic probe to measure hydroxyly radical in cells using conventional fluorescence microscopy, high-content imaging, microplate fluorometry, or flow cytometry. The cell-permeant ROS Brite™ HPF reagent is nonfluorescent and produces bright green fluorescence upon reaction with hydroxyl radical. The resulting fluorescence can be measured using fluorescence imaging, high-content imaging, microplate fluorometry, or flow cytometry. In the presence of peroxidase, HPF also reacts with hydrogen peroxide. HPF has good selectivity to hydroxyl radical compared to other ROS (e.g., supoeroxide and nitric oxide). APF and HPF show relatively high resistance to light-induced oxidation. APF and HPF are nonfluorescent until they react with the hydroxyl radical or peroxynitrite anion.
Chemical structure for ROS Brite™ HPF *Optimized for Detecting Reactive Oxygen Species (ROS)*
Chemical structure for ROS Brite™ HPF *Optimized for Detecting Reactive Oxygen Species (ROS)*
CatalogSize
Price
Quantity
160511 mg
Price
 
Physical properties

Molecular weight424.40
SolventDMSO
Spectral properties

Excitation (nm)498
Emission (nm)517
Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12352200
Instrument settings

Flow cytometer
Excitation488 nm laser
Emission530/30 nm filter
Instrument specification(s)FITC channel

Fluorescence microscope
ExcitationFITC filter set
EmissionFITC filter set
Recommended plateBlack wall/clear bottom

Fluorescence microplate reader
Excitation490 nm
Emission525 nm
Cutoff515 nm
Recommended plateSolid black
Instrument specification(s)Bottom read mode
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Page updated on October 8, 2025