Supplier Page from Thermo Fisher Scientific for Lead(IV) oxide, Puratronic:r, 99.995% (metals basis)
Ethoxymethylenemalononitrile, 98% from Thermo Fisher Scientific
Ethyl 3-aminocrotonate, 98.5% from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
meso-Erythritol, 99% from Thermo Fisher Scientific