Supplier Page from Thermo Fisher Scientific for 4,4'-Diaminobiphenyl-2,2'-disulfonic acid hydrate, cont. up to 30% water
Ethyl 3-hydroxybutyrate, 99% from Thermo Fisher Scientific
Ethyl 4,4,4-trifluoroacetoacetate, 97% from Thermo Fisher Scientific
Ethyl acrylate, 99.5%, stabilized from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific