Supplier Page from Thermo Fisher Scientific for Polyvinylsulfuric acid potassium salt, approx. M.W. 175,000
2-Ethylaniline, 98% from Thermo Fisher Scientific
4-Ethylaniline, 99+% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethylenediamine, 99% from Thermo Fisher Scientific