Sulfo-Cyanine3.5 carboxylic acid

Cat. # Quantity Price Lead time
12390 1 mg $110.00 in stock
22390 5 mg $290.00 in stock
42390 25 mg $690.00 in stock
52390 50 mg $1190.00 in stock
62390 100 mg $1850.00 in stock

Sulfo-Cyanine3.5 is a cyanine fluorophore with fluorescence in the orange spectrum range. Its absorption and emission spectra are between those of Cyanine3 and Cyanine5.

This dye is a sulfonated form of Cyanine3.5 (contains four sulfo groups), so it has good solubility and can be used in reactions without adding organic solvents.

This reagent is a derivative with a free carboxyl group. Because of its inactivity in physiological conditions, sulfo-Cyanine3.5 carboxylic acid derivative can be used as a negative control in experiments with active dye derivatives. The carboxylic acid can be activated with carbodiimides (e. g. EDAC) and react with hydrazines, hydroxylamines, and amines.

Absorption and emission spectra of sulfo-Cyanine3.5

Absorption and emission spectra of sulfo-Cyanine3.5

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General properties

Appearance: dark colored solid
Molecular weight: 991.26
Molecular formula: C38H37N2K3O14S4
Solubility: good in water, DMF, DMSO
Quality control: NMR 1H, HPLC-MS (95%)
Storage conditions: Storage: 24 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: 576
ε, L⋅mol−1⋅cm−1: 139000
Emission maximum, nm: 603
Fluorescence quantum yield: 0.11
CF260: 0.16
CF280: 0.17
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