Coumarin 343 X NHS ester

Cat. # Quantity Price Lead time
12620 1 mg $110.00 in stock
22620 5 mg $210.00 in stock
42620 25 mg $410.00 in stock
52620 50 mg $695.00 in stock
62620 100 mg $1190.00 in stock

Blue emitting Coumarin 343 dye can form a FRET pair with fluorescein (FAM). An amine reactive form, activated NHS ester.

This amine-reactive NHS ester contains an aminohexanoyl linker between the fluorophore, and the reactive group. This linker provides better solubility and spatial separation between the fluorophore, and the target molecule being labeled.

This reagent can be used to design FRET based assays with FAM as acceptor, and to construct systems which harvest blue light energy.

Absorption and emission spectra of Coumarin 343

Absorption and emission spectra of Coumarin 343

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General properties

Appearance: yellow solid
Molecular weight: 495.52
CAS number: 946123-12-2
Molecular formula: C26H29N3O7
Solubility: good in DCM, DMSO, DMF
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: 437
ε, L⋅mol−1⋅cm−1: 39000
Emission maximum, nm: 477
Fluorescence quantum yield: 0.63
CF260: 0.29
CF280: 0.24

Product citations

  1. Zheng, L.; Zhao, H.; Han, Y.; Qian, H.; Vukovic, L.; Mecinović, J.; Král, P.; Huck, W.T.S. Catalytic transport of molecular cargo using diffusive binding along a polymer track. Nature Chemistry, 2019, 11(4), 359–366. doi: 10.1038/s41557-018-0204-7
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