Although limewater is a relatively mild laboratory chemical, it is an alkaline solution that can cause mild skin irritation and serious eye discomfort upon direct contact. Always wear standard laboratory personal protective equipment (PPE)—including safety goggles, a lab coat, and protective gloves—when pouring or handling this reagent. Keep the bottle tightly capped at all times immediately after use to prevent the solution from reacting with ambient air and spoiling. Store in a cool, dry place away from direct sunlight and incompatible acids