It is estimated that the absorption of 1 microcurie of I-125 in the thyroid gland produces a dose of 5 Rad. To ensure that all personnel conducting iodination receive a minimal amount of radiation ...

Whenever unsealed radioactive materials (liquid solutions in vials, ampoules, test tubes) are handled (pipetted, transported, mixed, transferred) it is possible to contaminate laboratory benches, ...

The company guaranteed a minimum of 1 microcurie per bottle. How healthy was it? Not so much. The gory quote below shows what happened to Eben McBurney Byers, a millionaire industrialist in the 1920s.