Sulfo-Cyanine5.5 NHS ester is an amine-reactive active ester of a sulfonated far-infrared Cyanine5.5 fluorophore (an analogue of Cy5.5). This reagent is the preferred choice for labeling antibodies, sensitive proteins, and other substances in reactions that require a pure water environment or minimal addition of organic co-solvents. The dye is highly suitable for non-invasive in vivo near-infrared imaging and applications that demand a low fluorescence background.

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.