Supplier Page from Thermo Fisher Scientific for Thymolphthalein, 0.05% w/v solution in ethanol
2,6-Lutidine, 99% from Thermo Fisher Scientific
5-Aminolevulinic acid hydrochloride, 98+% from Thermo Fisher Scientific
Imidazole, 99% from Thermo Fisher Scientific
L(+)-Glutamic acid monosodium salt monohydrate, 99% from Thermo Fisher Scientific