Cyanine3B carboxylic acid

Cat. # Quantity Price Lead time
2321-1mg 1 mg $125 in stock
2321-5mg 5 mg $325 in stock
2321-25mg 25 mg $850 in stock
2321-50mg 50 mg $1490 in stock
2321-100mg 100 mg $2450 in stock
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Cyanine3B is a yellow-emitting cyanine dye that is an improved version of the Cyanine3 fluorophore with significantly higher fluorescence quantum yield and photostability.

Cyanine3B carboxylic acid is a non-reactive form of Cyanine3B that can be used as a reference standard in experiments using conjugates of this fluorophore. Cyanine3B carboxylic acid can also be used to synthesize activated esters or modified with hydrazines, hydroxylamines, and amines for subsequent conjugation with biomolecules.

Cyanine3B absorbance and emission spectra

Cyanine3B absorbance and emission spectra

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General properties

Appearance: dark red powder
Molecular weight: 560.67
CAS number: 228272-69-3
Molecular formula: C31H32N2O6S
Solubility: good in DMF, DMSO
Quality control: NMR 1H and HPLC-MS (95+%)
Storage conditions: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 559
ε, L⋅mol−1⋅cm−1: 121000
Emission maximum, nm: 571
Fluorescence quantum yield: 0.68
CF260: 0.044
CF280: 0.077
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