QSY-21
Product Specifications
CAS Number
1200894-41-2
Bioactivity
QSY-21 is a fluorescence quencher with broad absorption in the far-red and near-infrared regions, effectively quenching the fluorescence of dyes that emit in these areas. It is a carboxylic acid derivative with a strong maximum absorption at 661 nm, making it a suitable acceptor for fluorescence resonance energy transfer (FRET) applications. QSY-21 is commonly used as a quencher for Cyanine5, Cyanine5.5, AF 647, or other spectrally similar fluorescent dyes.
Smiles
[Cl-].O=C(O)C1CCN(CC1)S(=O)(=O)C=2C=CC=CC2C=3C=4C=CC(=CC4[O+]=C5C=C(C=CC53)N6C=7C=CC=CC7CC6)N8C=9C=CC=CC9CC8
Molecular Formula
C41H36ClN3O5S
Molecular Weight
718.26
Shipping Conditions
Cool pack
Storage Temperature
-20°C
Available Sizes
Curated Selection
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