sulfo-Cyanine3 hydrazide

Cat. # Quantity Price Lead time
11370 1 mg $125 in stock
21370 5 mg $325 in stock
41370 25 mg $850 in stock
51370 50 mg $1490 in stock
61370 100 mg $1990 in stock
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sulfo-Cyanine3 is a sulfated derivative of Cyanine3 dye, well soluble in water because of two negatively charged sulfo groups in its structure. By its spectral characteristics, this yellow-orange fluorescent dye is an analog of Cy™3.

Hydrazides efficiently react with aldehydes and ketones resulting in hydrazones, so this compound can be used for conjugation with carbonyl derivatives of biomolecules.

The reaction runs in aqueous conditions, which is important when working with antibodies and proteins. Cys-diol groups in sugars in glycosylated proteins and antibodies can be oxidized into dialdehydes, and cysteine in proteins can be converted with enzymes to formyl glycerol (i. e. reactive groups for conjugation with sulfo-Cyanine3 hydrazide). Carboxyl groups of aspartic and glutamic acids in proteins and peptides can be also conjugated with sulfo-Cyanine3 hydrazide in the presence of activating agents: carbodiimide (EDAC) or methyl morpholine (DMTMM) derivatives.

Absorption and emission spectra of sulfo-Cyanine3

Absorption and emission spectra of sulfo-Cyanine3

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General properties

Appearance: dark red solid
Molecular weight: 630.78
CAS number: 2144762-62-7
Molecular formula: C30H38N4O7S2
IUPAC name: 3H-​Indolium, 2-​[3-​[1-​(6-​hydrazinyl-​6-​oxohexyl)​-​1,​3-​dihydro-​3,​3-​dimethyl-​5-​sulfo-​2H-​indol-​2-​ylidene]​-​1-​propen-​1-​yl]​-​1,​3,​3-​trimethyl-​5-​sulfo-​, inner salt
Solubility: soluble in water, DMF, DMSO
Quality control: NMR 1H, HPLC-MS (90%)
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.
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
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