Iodine is attributed to water hazard class 1. This means it is only slightly harmful when dissolved in water. However, reactions with alkali metals, aluminum, mercury, fluorine or terpentine may increase the risk.

Does iodine react with water?

Reactions: Iodine. Iodine reacts with water to produce hypoiolite, OI^-. The pH of the solution determines the position of the equilibrium. Iodine is not reactive towards with oxygen or nitrogen.

What happens when iodine is mixed with water?

Pure iodine is violet, but when it's dissolved in water, it accepts an electron from the oxygen atom, affecting how it absorbs light. When you shake the fluids, the iodine leaves the water and dissolves in the oil, and returns to its purple colour!