Supplier Page from Thermo Fisher Scientific for 1,2-Naphthoquinone-4-sulfonic acid sodium salt, 97%
Ethyl 2-hydroxyethyl sulfide, 98% from Thermo Fisher Scientific
Ethyl trifluoroacetate, 99% from Thermo Fisher Scientific
Ethylbenzene, 99.8%, pure from Thermo Fisher Scientific
Glyoxylic acid monohydrate, 98%, pure from Thermo Fisher Scientific