Supplier Page from Thermo Fisher Scientific for 2-(4-Sulfophenylazo)1,8-dihydroxy-3,6-naphthalenedisulfonic acid, trisodium salt, indicator grade
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ethylcyclohexane, 99+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific
Fluorobenzene, 99% from Thermo Fisher Scientific