Supplier Page from Thermo Fisher Scientific for Barium carbonate, Puratronic:r, 99.997% (metals basis)
Ethyl 2-mercaptoacetate, 99% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific
Fluoranthene, 98% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific