In general, uranyl nitrate or uranyl acetate are considered
to be more chemically toxic as a heavy metal (like lead
or bismuth) than as a radiotoxic element and care should
be taken to prevent ingestion by following goo hygiene:
wearing disposable gloves (this will also minimize beta
exposure) and washing up after use.
Dusty, or vapor or aerosol-producing operations must
be contained in fume hoods or glove boxes since deposition
in the lungs is more hazardous.
The Stanford ALARA Annual Limit of Intake (amount which
will deliver 10% of the legal limit, i.e. 5 rem
to the bone surfaces) is 1 microcurie (oral) or 0.1 microcurie