Sulfo - Cyanine 3 NHS, a water - soluble and amine - reactive compound, can efficiently label proteins and polypeptides in pure aqueous solutions without the need for organic co - solvents. This makes it an ideal option for proteins with low solubility and those prone to denaturation. Moreover, the Sulfo - Cyanine 3 NHS ester can serve as a substitute for Cy3, Alexa Fluor 546, and DyLight 549, offering a practical alternative in various experimental and research settings.

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.