Supplier Page from Thermo Fisher Scientific for Perchloric acid, for analysis, ca. 70% solution in water
4-Ethylphenol, 97% from Thermo Fisher Scientific
Emodin, 95%, tech from Thermo Fisher Scientific
Ethyl 2-mercaptoacetate, 99% from Thermo Fisher Scientific
Flavone, 99+% from Thermo Fisher Scientific