Supplier Page from Thermo Fisher Scientific for Poly(styrene sulfonic acid) sodium salt, M.W. 500,000
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Epichlorohydrin, 99% from Thermo Fisher Scientific
Ethyl cyanoformate, 99% from Thermo Fisher Scientific
Ethylenediaminetetraacetic acid, tetrasodium salt hydrate, 98%, pure from Thermo Fisher Scientific