QSY-21 is a fluorescence quencher. QSY-21 possesses broad absorption in far red and NIR range, and can quench fluorescence of dyes that emit in this region. This is a carboxylic acid derivative. QSY-21 has intense absorption maximum at 661 nm, making it useful as an acceptor in fluorescence resonance energy transfer (FRET) applications. It is a common quencher for Cyanine5, Cyanine5.5, AF 647, or other spectrally similar fluorescent dyes.
Molecular Weight:
718.26
Purity:
98.77
CAS Number:
[1200894-41-2]
Formula:
C41H36ClN3O5S
Target:
Fluorescent Dye
Application Notes:
MCE Product type: Dye Reagents
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