What is the appropriate action when treating a patient with dry chemical on their arm?

When treating a patient with dry chemical on their arm, the most appropriate action is to first brush away the chemical before flushing with water. This step is crucial because certain dry chemicals can react adversely with water, potentially causing a more severe reaction or further skin damage. By gently brushing off the particles, you reduce the amount of chemical that may dissolve in water and increase the risk of a harmful reaction.

Flushing the area with water after brushing provides a means to remove any remaining chemical and soothe the skin, but it is essential that this step only happens after any dry residue has been removed to mitigate any risks. This approach ensures the safety of the patient and effectively decreases the risk of chemical burns or additional complications.

This method highlights the importance of understanding the specific properties of various chemicals and how they interact with water, guiding the first response in effectively managing such chemical exposures.