Sulfo-Cyanine5.5 maleimide

Cat. # Quantity Price Lead time
17380 1 mg $110.00 in stock
27380 5 mg $290.00 in stock
47380 25 mg $690.00 in stock
57380 50 mg $1270.00 in stock
67380 100 mg $1990.00 in stock

Sulfo-Cyanine5.5 dye is a water soluble far red to NIR emitting dye which is very hydrophilic due to the presence of four sulfo groups. Sulfo-Cyanine5.5 derivatives exhibit high water solubility. The dye is a perfect choice for the labeling of sensitive proteins, nanoparticles, and highly hydrophylic biopolymers.

This maleimide is a thiol reactive dye that selectively labels cysteine residues. Disulfide bonds of native proteins should be reduced with an appropriate reducing agent, such as TCEP, according to our recommended protocol.

Absorption and emission spectra of sulfo-Cyanine5.5

Absorption and emission spectra of sulfo-Cyanine5.5

Customers also purchased with this product

BDP FL maleimide

BDP FL maleimide is a bright and photostable thiol-reactive dye for protein labeling, an ideal replacement for fluorescein for microscopy.

Sulfo-Cyanine3 maleimide

Water soluble thiol-reactive derivative of Sulfo-Cyanine3, a Cy3® analog.

Sulfo-Cyanine7.5 NHS ester

A water soluble near infrared emitting dye for in vivo imaging applications. Sulfo-Cyanine7.5 is an analog of indocyanine green (ICG) possessing higher emission quantum yield, and containing a linker arm.

General properties

Appearance: dark colored solid
Mass spec M+ increment: 1024.2
Molecular weight: 1139.43
CAS number: 2183440-58-4 (potassium salt); 2183440-57-3 (inner salt)
Molecular formula: C46H45K3N4O15S4
Solubility: good in water, DMSO, DMF
Quality control: NMR 1H, HPLC-MS (95%)
Storage conditions: Storage: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation maximum, nm: 673
ε, L⋅mol−1⋅cm−1: 235000
Emission maximum, nm: 691
CF260: 0.09
CF280: 0.11

Product citations

  1. Wang, J.; Johnson, A.G.; Lapointe, C.P.; Choi, J.; Prabhakar, A.; Chen, D.-H.; Petrov, A.N.; Puglisi, J.D. eIF5B gates the transition from translation initiation to elongation. Nature, 2019, 573, 605–608. doi: 10.1038/s41586-019-1561-0
Your item has been added. View your cart or proceed to checkout
The count of items is incorrect.