What diluted solution is recommended to stabilize unfired stinging cells in fire coral stings?

Acetic acid solution (household white vinegar)

When dealing specifically with stings suspected to be from fire coral or other cnidarians, the initial response must prioritize neutralizing any nematocysts that have not yet fired. The recommended method for this is rinsing the affected area with a diluted acetic acid solution, which is commonly known as household white vinegar. The acetic acid works chemically to stabilize the nematocysts, effectively preventing them from injecting any remaining venom into the skin tissue. It is vital to understand that this action is preventative against future venom release; it does not have the capability to undo or neutralize venom that has already successfully been injected into the victim.