Supplier Page from Thermo Fisher Scientific for Bromothymol Blue
2-Mercapto-1-methylimidazole, 98% from Thermo Fisher Scientific
DL-Glutamic acid monohydrate, 98+% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Fumaric acid, 99+% from Thermo Fisher Scientific