CAS 27988-75-6 appears in our catalog under these names: Potassium tetrachloroaurate(III) hydrate, Premion½, 99.99% , Potassium tetrachloroaurate(III) hydrate, 99% , Potassium tetrachloroaurate(III) hydrate, Premion|r, 99.99% (metals basis), Au 49% min . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 5g, 1g.