Supplier Page from Thermo Fisher Scientific for Tartrazine
2-Mercaptobenzothiazole, 95% from Thermo Fisher Scientific
2-Methoxybenzyl alcohol, 99% from Thermo Fisher Scientific
5-Hydroxyindole-3-acetic acid, 99% from Thermo Fisher Scientific
L(+)-Histidine methyl ester dihydrochloride, 97% from Thermo Fisher Scientific