Fluorescence Quenchers

Brand Name Dye  

SY-9 NHS ester
A nonfluorescent acceptor dye with quenching range of 500-600 nm.
QSY®-7

Reactivity: Primary amine

SY-7 NHS ester
SY-9 NHS ester
A hydrophilic version of SY-7 acceptor with quenching range of 500-600 nm.
QSY®-9

Reactivity: Primary amine

SY-9 NHS ester
SY-9 NHS ester
A nonfluorescent acceptor with quenching range of 580-680 nm.
QSY®-21

Reactivity: Primary amine

SY-21 NHS ester
SY-9 NHS ester
A nonfluorescent acceptor with quenching range of 480-580 nm.
SY-9 NHS ester
A nonfluorescent acceptor dye with quenching range of 560-670 nm.
SY-9 NHS ester
A dark, far-red nonfluorescent acceptor dye with quenching range of 620-730 nm.
SY-9 NHS ester
A long-wavelength nonfluorescent acceptor dye with quenching range of 550-750 nm.