2021/01/07 · 90 Yttrium is a decay product of 90 Strontium with a half-life of 64.1 hours. It decays by emission of beta radiation of 2.281 MeV (100%) of maximal energy to 90 Zirconium. 90 Yttrium chloride solution is available with the activity ranging from 0.1 – 50 GBq per vial at reference time and a volume from 0.1 – 5ml per vial as requested.