Supplier Page from Thermo Fisher Scientific for (1S)-(+)-Camphor-10-sulfonic acid, 98+%(dry wt.), water <2%
4-Ethylresorcinol, 98% from Thermo Fisher Scientific
Ergosterol, 98% from Thermo Fisher Scientific
Ethyl benzoate, 99+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific