sulfo-Cyanine3 NHS ester 磺化Cy3-NHS 活化酯

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

This is the 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 and DyLight 549 for all applications.

General properties
Appearance: dark red crystals
Molecular weight: 751.91
CAS number: 1424150-38-8 (sodium salt); 1424433-17-9, 1518643-34-9 (inner salt)
Molecular formula: C34H38N3KO10S2
IUPAC name: 3H-?Indolium, 2-?[3-?(1,?3-?dihydro-?1,?3,?3-?trimethyl-?5-?sulfo-?2H-?indol-?2-?ylidene)?-?1-?propen-?1-?yl]?-?1-?[6-?[(2,?5-?dioxo-?1-?pyrrolidinyl)?oxy]?-?6-?oxohexyl]?-?3,?3-?dimethyl-?5-?sulfo-?, inner salt, sodium salt
Solubility: soluble in water (0.62 M = 47 g/L), 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
Product specifications
Spectral properties
Excitation/absorption 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

JP1026 5MG