Supplier Page from Thermo Fisher Scientific for Pyrocatechol Violet, pure, indicator grade
1-Fluoro-4-nitrobenzene, 99% from Thermo Fisher Scientific
4-Fluorobenzyl chloride, 98% from Thermo Fisher Scientific
Emodin, 95%, tech from Thermo Fisher Scientific
Ethyltriphenylphosphonium bromide, 98% from Thermo Fisher Scientific