Which action reduces inhalation exposure when handling volatile liquids?

• A. Cap flasks containing volatile liquids
• B. Always wear goggles
• C. Clean surface
• D. Use a dustpan and broom to clean up broken glass

Answer: (A)

Volatile liquids release vapors that can be inhaled, so the best way to cut inhalation exposure is to prevent vapor from entering the air in the first place. Keeping flasks capped minimizes evaporation by limiting the liquid’s surface area exposed to air, keeping more of the vapor inside the container. Goggles protect eyes from splashes but don’t reduce inhaled vapors. Cleaning a surface or sweeping up broken glass addresses spills and physical safety, not the ongoing evaporation from an open container. So, capping the flasks is the most effective way to reduce inhalation exposure.