Supplier Page from Thermo Fisher Scientific for Toluidine Blue O, Certified, 65% min dye content
3-Fluoroaniline, 98% from Thermo Fisher Scientific
Ethyl butyrate, 99% from Thermo Fisher Scientific
Ethylbenzene, 99.8%, pure from Thermo Fisher Scientific
Ethylenediamine, 99% from Thermo Fisher Scientific