IAEDANS is an organic fluorophore (fluorescent molecule). It stands for 5-({2-[(iodoacetyl)amino]ethyl}amino)naphthalene-1-sulfonic acid. It is widely used as a marker in fluorescence spectroscopy.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.