Supplier Page from Thermo Fisher Scientific for Bromothymol Blue, 0.04% aqueous solution
2(2-Ethoxyethoxy)ethanol, 98+% from Thermo Fisher Scientific
2-Ethylhexanoic acid, 99% from Thermo Fisher Scientific
3-Fluorobenzoic acid, 99% from Thermo Fisher Scientific
Ethyl chloroformate, 99% from Thermo Fisher Scientific