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EDANS acid
5-((2-Aminoethyl)amino)naphthalene-1-sulfonic acid; CAS 50402-56-7
EDANS 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.
Chemical structure for EDANS acid [5-((2-Aminoethyl)amino)naphthalene-1-sulfonic acid] *CAS 50402-56-7*
Chemical structure for EDANS acid [5-((2-Aminoethyl)amino)naphthalene-1-sulfonic acid] *CAS 50402-56-7*
CatalogSize
Price
Quantity
6101 g
Price
 
Physical properties

Molecular weight266.32
SolventDMSO
Spectral properties

Correction factor (280 nm)0.107
Extinction coefficient (cm -1 M -1)
5900
Excitation (nm)336
Emission (nm)455
Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12171501
CAS50402-56-7
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Page updated on October 13, 2025