Coumarin 343 X carboxylic acid

Cat. # Quantity Price Lead time
12690 1 mg $110.00 in stock
22690 5 mg $210.00 in stock
42690 25 mg $410.00 in stock
52690 50 mg $695.00 in stock
62690 100 mg $1190.00 in stock

Coumarin 343 is a blue emitting fluorophore used as a laser dye. The fluorophore can serve as a FRET donor for FAM (fluorescein).

Absorption and emission spectra of Coumarin 343

Absorption and emission spectra of Coumarin 343

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Water soluble cyanine dye with bright fluorescence, and high extinction coefficient. Contains an amino group for the conjugation with electrophiles, and enzymatic transamination labeling.

Cyanine7 carboxylic acid

Non-reactive, near-infrared fluorescent dye.

Cyanine3 amine

Cyanine3 is an fluorophore with free amino group (amino-dye). It can be conjugated with NHS esters, carboxy groups (after activation), and epoxides.

General properties

Appearance: yellow crystals
Molecular weight: 398.45
Molecular formula: C22H26N2O5
IUPAC name: 6-({4-Oxo-3-oxa-13-azatetracyclo[7.7.1.02,7.013,17]heptadeca-1,5,7,9(17)-tetraen-5-yl}carbonylamino)hexanoic acid
Solubility: Well soluble in DMF, DMSO, moderately soluble in DCM, DCE, EtOAc, insoluble in diethyl ether.
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 maximum, nm: 437
ε, L⋅mol−1⋅cm−1: 39000
Emission maximum, nm: 477
Fluorescence quantum yield: 0.63
CF260: 0.29
CF280: 0.24
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