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IRDye® QC-1 Non-fluorescent Quencher Dye by LI-COR Biosciences

Manufacturer LI-COR Biosciences  |  Available Worldwide
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IRDye QC-1 is the first non-fluorescent (dark) quencher, compatible with a wide range of visible and near-infrared fluorophores (~500 – 800 nm).


IRDye® QC-1 Non-fluorescent Quencher Dye by LI-COR Biosciences product image
IRDye® QC-1 Non-fluorescent Quencher Dye
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The first non-fluorescent (dark) quencher, compatible with a wide range of visible and near-infrared fluorophores (~500 – 800 nm). 

  • Used for FRET (fluorescence resonance energy transfer) applications such as protease assays 
  • Efficient non-fluorescent quenching of near-infrared (NIR) dyes 
  • Caspase-3 Protease Assay substrate 
  • Widest available quenching range – no need to carefully match the donor's fluorescence spectrum with the acceptor's absorbance 
  • Pair IRDye QC-1 with any visible or near-infrared fluorophore within its wide wavelength range 
  • Quenches common fluorophores with >97% efficiency