Supplier Page from Thermo Fisher Scientific for Sodium carbonate, ACS primary standard, 99.95-100.05% (dried basis)
1-Fluoro-4-nitrobenzene, 99% from Thermo Fisher Scientific
Emodin, 95%, tech from Thermo Fisher Scientific
Ethyl benzoate, 99+% from Thermo Fisher Scientific
Ethyl butyrylacetate, 98% from Thermo Fisher Scientific