Which radioactive label is associated with a maximum radiation level of 0.5 mR/hr?

The radioactive label associated with a maximum radiation level of 0.5 mR/hr is indeed the Radioactive White I label. This classification is specifically designed for materials that present a low radiation hazard. The White I label indicates that the surface radiation levels do not exceed 0.5 mR/hr, which reflects its relatively safe handling conditions compared to labels with higher radiation limits.

The other labels represent different levels of radiation exposure. Radioactive Yellow I allows for higher exposure levels, while Radioactive Yellow II further increases the permitted radiation levels, indicating a more significant potential hazard. Radioactive III is reserved for the highest exposure category, which can present serious health risks if not handled correctly. Thus, the Radioactive White I label is specifically designated for items that maintain a low radiation level, ensuring a safer environment for those who may come into contact with them.