Supplier Page from Thermo Fisher Scientific for Sodium hydroxide, 0.1 N standard solution
Emodin, 95%, tech from Thermo Fisher Scientific
Ethyl 2-bromoisobutyrate, 98% from Thermo Fisher Scientific
Ethylenediaminetetraacetic acid, 99%, pure from Thermo Fisher Scientific
Eugenol, 99% from Thermo Fisher Scientific