Quercetin, 5 g

Quercetin is a naturally occurring flavonoid polyphenol widely used in biomedical research as a redox modulator and free-radical scavenger. Supplied by STEMCELL Technologies as a 5 g unit, this off-white to pale yellow crystalline powder (CAS 117-39-5, molecular weight 302.24 g/mol) supports in vitro studies of oxidative stress, inflammatory signaling, and cellular senescence. Researchers commonly add it to cell culture media at working concentrations of 1 to 100 uM to probe autophagy, apoptosis, and NF-kB pathway activity. The reagent is packaged in a sealed bottle and should be stored at room temperature, protected from light and moisture to preserve the aglycone integrity. It dissolves readily in DMSO or ethanol for stock preparation and is intended for research use only, making it a flexible tool for pharmacology, aging, and immunology workflows.