Supplier Page from Thermo Fisher Scientific for p-Toluenesulfonic acid monohydrate, 99%, extra pure
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl acrylate, 99.5%, stabilized from Thermo Fisher Scientific
Ethyl bromopyruvate, 80-85% from Thermo Fisher Scientific
Ethyl phenylpropiolate, 98% from Thermo Fisher Scientific