Supplier Page from Thermo Fisher Scientific for Potassium sulfate, Puratronic:r, 99.997% (metals basis)
Ethyl 3-pyridylacetate, 99% from Thermo Fisher Scientific
Ethyl acrylate, 99.5%, stabilized from Thermo Fisher Scientific
Ethyl butyrylacetate, 98% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific