Supplier Page from Thermo Fisher Scientific for Methyl Red sodium salt, 0.02% w/v aq. soln
D(-)-Ribose, 99+% from Thermo Fisher Scientific
DL-Glutamic acid monohydrate, 98+% from Thermo Fisher Scientific
L-Serine, 99% from Thermo Fisher Scientific
Semicarbazide hydrochloride, 99+% from Thermo Fisher Scientific