If contamination is greater than 50,000 cpm, notify the vendor for possible replacement. Provide shielding if necessary. Store the stock vial in a designated, posted area. Store forms together in the binder provided by Radiation Safety. Return form to Radiation Safety when the radioisotope is expended.
Most radioactive compounds have a limited shelf life due to radiolytic decomposition.
If the shelf life has been surpassed, the chemical integrity of the compound cannot be assured.