2. Others
  3. Fluorescent Dye
  4. QSY-21

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.

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QSY-21 Chemical Structure

QSY-21 Chemical Structure

CAS No. : 1200894-41-2

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Description

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

Formula

C41H36ClN3O5S
CAS No.
SMILES

O=C(C1CCN(S(=O)(C2=C(C3=C4C=CC(N5C6=C(CC5)C=CC=C6)=CC4=[O+]C7=C3C=CC(N8C9=C(CC8)C=CC=C9)=C7)C=CC=C2)=O)CC1)O.[Cl-]
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Room temperature in continental US; may vary elsewhere.
Storage

Please store the product under the recommended conditions in the Certificate of Analysis.
Purity & Documentation
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QSY-21 Related Classifications

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The dilution calculator equation

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This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

Keywords:

QSY-211200894-41-2QSY21QSY 21Fluorescent DyeInhibitorinhibitorinhibit

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