DusQ 21 NHS ester

Cat. # Quantity Price Lead time
28D20 5 mg –   in stock
48D20 25 mg $315 in stock
68D20 100 mg $885 in stock
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DusQ 21 is a dark quencher used as an acceptor in FRET applications, it has absorption maximum 656 nm, and can be used in multiplex assays due to the lack of secondary fluorescence. It is a quencher of choice for pairing with fluorescent dyes that emit in the red and near-infrared part of the range. DusQ 21 NHS ester derivative is used for labeling with the primary amines of amine-containing molecules. It can be used for quenching of many fluorophores, including Cyanine5, Cyanine5.5, AF 647.

Absorption spectrum of DusQ 21

Absorption spectrum of DusQ 21

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General properties

Appearance: dark purple powder
Molecular weight: 815.35
CAS number: 304014-13-9
Molecular formula: C45H39ClN4O7S
Quality control: NMR 1H and HPLC-MS (95+%)
Storage conditions: 12 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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