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Invitrogen™ SNARF™-4F 5-(and-6)-Carboxylic Acid, Acetoxymethyl Ester, Acetate - Special Packaging Non-distribution product as customer accommodation. Available on GSA/VA Contract for Federal Government customers only.

Cell-permeant ratiometric pH indicator

Manufacturer:  Invitrogen™ S23921

Catalog No. S23921

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  • pKa of approximately 6.4
  • Exhibits significant pH-dependent emission shift from yellow-orange to deep red fluorescence under acidic and basic conditions, respectively
  • This pH dependence allows ratio of fluorescence intensities from 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

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Shipping Condition: Room temperature



Fluorescent Dye-Based
Store in freezer (-5 to -30°C).
Fluorescence Microscope, Flow Cytometer, Microplate Reader
pH Indicator
Room Temperature
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For Research Use Only. Not for use in diagnostic procedures.