Which route of exposure applies to calcium sulfate according to the NIOSH Pocket Guide?

The route of exposure that applies to calcium sulfate, as identified in the NIOSH Pocket Guide, is inhalation. This is primarily because calcium sulfate can become airborne, especially in occupational settings where it is handled as a powder or dust. When inhaled, particles of calcium sulfate may cause respiratory irritation or other health issues, which is a common concern in workplaces dealing with fine particulate matter.

While oral ingestion, dermal absorption, and injection are also routes through which substances can enter the body, they are less relevant in the context of calcium sulfate exposure. For example, although ingestion could theoretically occur, it is not a typical or significant route of exposure in environments where calcium sulfate is commonly found. Dermal absorption is generally negligible for substances like calcium sulfate, and injection is not a typical route associated with this compound. Understanding the most common route of exposure helps in implementing appropriate safety measures and health monitoring in occupational settings.