Supplier Page from Thermo Fisher Scientific for Methyl Yellow, pure, indicator grade
Ethyl 4,4,4-trifluoroacetoacetate, 97% from Thermo Fisher Scientific
Ethyl isonipecotate, 98+% from Thermo Fisher Scientific
Ethyl picolinate, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific