Coumarin 343 azide

This product is discontinued, and no longer available.
 We recommend Coumarin 343 X azide as a substitute
Cat. # Quantity Price Lead time
NO items of this product available in stock but you can submit request for bulk.

This product will be discontinued soon in favor of Coumarin 343 X azide. We may still have some material in stock (please see availability above).

This greenish-blue emitting fluorophore can be used as a FRET donor for FAM. Azide derivative is suitable for Click Chemistry.

Coumarin 343 absorption and emission spectra

Coumarin 343 absorption and emission spectra

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General properties

Appearance: yellow powder
Molecular weight: 441.48
CAS number: 1807503-82-7
Molecular formula: C22H27N5O5
Solubility: Good in organic solvents (DCM, chloroform, DMF, DMSO, MeCN, alcohols), poor in water
Quality control: NMR 1H (95%) TLC, functional testing
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: 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. Musiol-Kroll, E.M.; Zubeil, F.; Schafhauser, T.; Härtner, T.; Kulik, A.; McArthur, J.B.; Koryakina, I.; Wohlleben, W.; Grond, S.; Williams, G.J.; Lee, S.Y.; Weber, T. Polyketide bio-derivatization using the promiscuous acyltransferase KirCII. ACS Synthetic Biology, 2017, 6(3), 421–427. doi: 10.1021/acssynbio.6b00341
  2. Teske, N.S.; Voigt, J.; Shastri, V.P. Clickable Degradable Aliphatic Polyesters via Copolymerization with Alkyne Epoxy Esters: Synthesis and Postfunctionalization with Organic Dyes. Journal of the American Chemical Society, 2014, 136(29), 10527-10533. doi: 10.1021/ja505629w
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