Supplier Page from Thermo Fisher Scientific for Nickel tungsten oxide, 99.9% (metals basis excluding Co), Co <100ppm
4-Fluoroaniline, 98% from Thermo Fisher Scientific
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ethyl butyrate, 99% from Thermo Fisher Scientific
Ethyl cyanoformate, 99% from Thermo Fisher Scientific