Supplier Page from Thermo Fisher Scientific for Bromothymol Blue, 0.04% aqueous solution
4'-Fluoroacetophenone, 99% from Thermo Fisher Scientific
Eicosanoic acid, 98% from Thermo Fisher Scientific
Ethyl 3-aminobenzoate, 99+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific