Supplier Page from Thermo Fisher Scientific for Ethylenediaminetetraacetic acid disodium salt, 0.115N (0.0575M) Standardized solution
Hexanoic acid, 99% from Thermo Fisher Scientific
Melatonine, 99% from Thermo Fisher Scientific
Mineral oil, for spectroscopy, suitable for nujol mull preparations for IR-spect from Thermo Fisher Scientific
Semicarbazide hydrochloride, 99+% from Thermo Fisher Scientific