Supplier Page from Thermo Fisher Scientific for 12-Crown-4, 98%
Ethylenediamine, 99% from Thermo Fisher Scientific
Ethyltriphenylphosphonium bromide, 98% from Thermo Fisher Scientific
Fluorescein isothiocyanate isomer I, 90%, pure from Thermo Fisher Scientific
N-Ethylaniline, 98% from Thermo Fisher Scientific