Supplier Page from Thermo Fisher Scientific for Naphthalene-1-sulfonic acid sodium salt, 99% (dry wt.), water <2%
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific
Ethyl phenylpropiolate, 98% from Thermo Fisher Scientific
Ethylenediamine, 99% from Thermo Fisher Scientific
Fluorescein isothiocyanate isomer I, 90%, pure from Thermo Fisher Scientific