What is the first action an operator should take if concentrated sulfuric acid spills on their arm?

When concentrated sulfuric acid spills on the skin, it can cause severe chemical burns and damage to tissue. The best immediate action is to rinse the affected area with water for at least 15 minutes. This is crucial because water helps to dilute the acid and wash it away from the skin, minimizing the extent of the injury and preventing further damage.

Rinsing with water is a critical first-aid procedure for chemical burns, as it helps to neutralize the acid and remove it from contact with the skin. Time is of the essence in this scenario; the sooner the area is rinsed, the better the outcome for the injured individual.

While seeking medical help is also important after providing first aid, the immediate priority is to safely remove the chemical from the skin to reduce injury. Other actions, such as applying ointments or covering the area with cloth, may trap the acid against the skin or be ineffective in addressing the chemical burn, making immediate rinsing the most effective and recommended first step.