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Invitrogen™ Molecular Probes™ SNARF™ -5F 5-(and-6)-Carboxylic Acid DFS Item

Cell-impermeant ratiometric pH indicator

Manufacturer:  Invitrogen™ LSS23922

Catalog No. S23922



  • pKa of approximately 7.2
  • Exhibits significant pH-dependent emission shift from yellow-orange to deep red fluorescence under acidic and basic conditions, respectively
  • This pH dependence allows the ratio of the fluorescence intensities from the dye at two emission wavelengths, typically 580nm and 640nm, to be used for quantitative determinations of pH

Cell Analysis, Cell Metabolism, Cell Viability, Proliferation and Function, Ionic Homeostasis and Signaling, pH Detection

Order Info

Shipping Condition: Room temperature



Flow Cytometer, Fluorescence Microscope, Microplate Reader
Store at room temperature and protect from light.

For Research Use Only. Not for use in diagnostic procedures.