Supplier Page from Thermo Fisher Scientific for Ninhydrin, ACS reagent
2-Mercaptobenzothiazole, 95% from Thermo Fisher Scientific
Benzalkonium chloride, alkyl distribution C8-C16, 50 wt% aqueous solution from Thermo Fisher Scientific
Ethylene carbonate, 99+% from Thermo Fisher Scientific
Inosine, 99% from Thermo Fisher Scientific