DusQ 21 carboxylic acid

Cat. # Quantity Price Lead time
28D90 5 mg –   in stock
48D90 25 mg $290 in stock
68D90 100 mg $885 in stock
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DusQ 21 is a fluorescence quencher. DusQ 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.

DusQ 21 has intense absorption maximum at  656 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.

Absorption spectrum of DusQ 21

Absorption spectrum of DusQ 21

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DusQ 21 NHS ester

Amino-reactive NHS ester with quencher for the conjugation with amines-containing molecules, DusQ 21 quenching range 590 - 720 nm.
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sulfo-Cyanine5 NHS ester

Water-soluble sulfo-Cyanine5 succinimidyl ester for labeling various amine-containing molecules in the aqueous phase.

General properties

Appearance: dark purple powder
Molecular weight: 718.28
Molecular formula: C41H36ClN3O5S
Quality control: NMR 1H and HPLC-MS (95+%)
Storage conditions: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 656
ε, L⋅mol−1⋅cm−1: 72800
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