What should be done if sulfuric acid from a lead-acid battery contacts the skin?

In the event that sulfuric acid from a lead-acid battery makes contact with the skin, it is crucial to neutralize the acid to mitigate damage, as sulfuric acid is a strong corrosive agent. Neutralizing the acid helps to reduce its harmful effects before flushing the area with water to ensure thorough cleaning and removal of any residual acid.

Using baking soda, which is a mild alkaline substance, effectively neutralizes the acid and can help to neutralize the pH levels on the skin. Following this initial step with a thorough flush of water is essential to remove both the neutralized acid and any remnants of baking soda. This two-step process—neutralization followed by flushing—ensures that the skin is not only protected from further damage but is also cleaned properly.

Other methods, such as using vinegar or soap and water, may not provide the same level of effectiveness in neutralizing the acid before flushing, which is critical in minimizing injury. Moreover, using an eye fountain for rinsing would not be appropriate since the contact was with the skin, not the eyes. Thus, the combination of neutralizing with baking soda and followed by rinsing with plenty of water is the most effective and safest response.