DusQ® 21 NHS ester

NHS esters DusQ® 21

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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Items in stock will be shipped on 04/01/2025

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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.

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Absorption spectrum of DusQ 21

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NHS Ester Labeling of Biomolecules Containing Primary Amino Groups

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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

This Product is offered and sold for research purposes only. It has not been tested for safety and efficacy in food, drug, medical device, cosmetic, commercial or any other use. Supply does not express or imply authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, in the manufacture of food or pharmaceutical products, in medical devices or in cosmetic products.