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You are here:Home » Molecular Biology » MB-Fluorescent Labels » N-(Aminoethyl)-5-naphthylamine-1-sulfonic Acid, Sodium Salt (1,5-EDANS, Sodium Salt)

N-(Aminoethyl)-5-naphthylamine-1-sulfonic Acid, Sodium Salt (1,5-EDANS, Sodium Salt)


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A fluorescent reagent with a terminal amine for derivatizaton. 1,5-EDANS has similar spectral properties to the naphthalenesulfonic acids. EDANS sodium salt is much more water-soluble than EDANS acid. It is one of the most popular donors for developing FRET-based nucleic acid probes (such as Molecular Beacons) and protease substrates. EDANS is often paired with DABCYL or DABSYL in FRET-based probes. Its fluorescence is environment-sensitive.
Catalog #A1377-75
Ex (nm) 335
Em (nm): 493
Melting Point 320-322°C
Solubility DMSO, Warm Water
Storage and StabilityMay be stored at RT for short-term only. Long-term storage is recommended at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.
Molecular FormulaC12H13N2NaO3S
Molecular Weight288.30
FormLight yellow powder
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological. Toxicity and Hazards: All products should be handled by qualified personnel only, trained in laboratory procedures.
Alternate names1,5-EDANS, Sodium Salt

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