Sulfo-Cyanine3 NHS ester

Cat. # Quantity Price Lead time
11320 1 mg $110.00 in stock
21320 5 mg $290.00 in stock
41320 25 mg $690.00 in stock
51320 50 mg $1270.00 in stock
61320 100 mg $1990.00 in stock

Water soluble, amino-reactive sulfo-Cyanine3 NHS ester. Efficiently labels proteins and peptides in purely aqueous solution, without need for organic co-solvent. Ideal for proteins with low solubility, and proteins prone to denaturation.

This is sulfonated, hydrophilic and water-soluble dye. Non-sulfonated Cyanine3 NHS ester is also available.

This product is an analog of Cy3® NHS ester. Sulfo-Cyanine3 NHS ester replaces Cy3®, Alexa Fluor 546, and DyLight 549 for all applications.

Sulfo-Cyanine3 absorbance and emission spectra

Sulfo-Cyanine3 absorbance and emission spectra

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DMF (dimethylformamide), labeling grade

Dry high purity amine free solvent for NHS ester labeling.

Coumarin 343 X NHS ester

Coumarin 343 is a blue emitting dye that can serve as a FRET donor for fluorescein (FAM). This structure features a linker between Coumarin 343 fluorophore, and the functional group. It provides better solubility, and spatial separation between the dye, and the functional group.

General properties

Appearance: dark red crystals
Molecular weight: 735.80
Molecular formula: C34H38N3NaO10S2
Solubility: very high in water, good in polar organic solvents (DMF, DMSO)
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

Spectral properties

Excitation maximum, nm: 548
ε, L⋅mol−1⋅cm−1: 162000
Emission maximum, nm: 563
Fluorescence quantum yield: 0.1
CF260: 0.03
CF280: 0.06

Product citations

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