Supplier Page from Thermo Fisher Scientific for Potassium, plasma standard solution, Specpure:r, K 1000µg/mL
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl L(-)-lactate, 97% from Thermo Fisher Scientific