If a laboratorian spills concentrated sulfuric acid and slips, what is the best immediate action to take?

In the event of a spill involving concentrated sulfuric acid, the immediate action required is to ensure the safety and decontamination of the individual affected by the spill. Using a safety shower is the most appropriate response because it allows for quick and ample rinsing of the skin or clothing that may have come into contact with the acid. Sulfuric acid is highly corrosive and can cause severe burns, so the priority is to remove the acid from the skin as rapidly as possible to minimize damage.

Activating the safety shower helps to wash away the acid and dilute its concentration, effectively reducing the risk of serious injury. Time is critical in this situation, and the swift use of the safety shower can significantly mitigate the harmful effects of the acid.

Other actions, such as calling security or taking the individual to the nearest hospital, may be necessary afterward, but they are not immediate responses to the spill. Pouring a base to neutralize the acid is also hazardous, as it can cause an exothermic reaction, potentially leading to splattering or additional injuries. Thus, using the safety shower is the best immediate response.