sentence: Iodine turns colorless when mixed with a reducing agent.
sentences_before: Some metals are purified using their iodides. Silver iodide is used in photographic film and cloud seeding. Erythrosine is a food coloring that has iodine in it. Iodine can be used to make illegal drugs so it is restricted in some areas. Iodine can be used as a test for reducing agents.
sentences_after: Iodine also turns black when mixed with starch. Iodides become colored when mixed with oxidizing agents.
concept_name: iodine
headings: Iodine Uses
categories: Halogens Chemical elements Nonmetals