Supplier Page from Thermo Fisher Scientific for Calcium carbonate, Puratronic:r, 99.99% (metals basis)
2-Ethoxyethyl ether, 98+%, extra pure from Thermo Fisher Scientific
2-Fluorobenzaldehyde, 97% from Thermo Fisher Scientific
Emodin, 95%, tech from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific