Supplier Page from Thermo Fisher Scientific for Ytterbium(III) 2,4-pentanedionate, REacton:r, 99.9% (REO)
Estrone, 99+% from Thermo Fisher Scientific
Hydroquinone, 99% from Thermo Fisher Scientific
Methyl acetoacetate, 99+% from Thermo Fisher Scientific
Semicarbazide hydrochloride, 99+% from Thermo Fisher Scientific