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
Found better price? Let us know and we will propose the way forward!

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

Customers also purchased with this product

Cyanine5 NHS ester

Amine-reactive Cyanine5 activated ester for the labeling of proteins, peptides, and other molecules.

BDP® 630/650 carboxylic acid

BDP 630/650 is a bright fluorophore for far red part of the spectrum. This dye is perfect for microscopy and fluorescence polarization assays. This is a carboxylic acid that can be activated for the coupling, or used as a control.
Add this product to your cart and
get free express delivery

AF 647 maleimide

AF 647 maleimide is a thiol-reactive far-red fluorescent dye for labeling of thiolated biomolecules (proteins, oligonucleotides, etc.).

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
Your item has been added. View your cart or proceed to checkout
The count of items is incorrect.