Supplier Page from Thermo Fisher Scientific for 3,3'-Diaminobenzidine tetrahydrochloride hydrate, 97%, contains up to 10% water
Eicosanoic acid, 98% from Thermo Fisher Scientific
Ethyl (ethoxymethylene)cyanoacetate, 98% from Thermo Fisher Scientific
Ethyl 3-aminocrotonate, 98.5% from Thermo Fisher Scientific
Ethyl oxamate, 99% from Thermo Fisher Scientific