HCQ-3 NHS has a maximum absorbance at 672 nm and can be placed at either the 5' or 3' end of an oligonucleotide or within its interior. Oligonucleotides labeled with BHQ-3 are employed in numerous applications, such as dual-labeled fluorescent probes for real-time PCR. This dark quencher has a strong absorption range from 620 to 730 nm, enabling it to quench fluorophores that emit fluorescence within this range, like Quasar 670 and Quasar 705 dyes.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.