Iodine has nutritional, medicinal and chemical uses. Iodine happens to be a constituent of various pharmaceutical products, printing inks, dyes, photographic chemicals, animal feeds and industrial catalysts. Iodine is a ... More »

Survivalists and outdoorsmen add iodine crystals to water, because iodine chemically purifies and disinfects untreated water. These crystals are used as a temporary measure, as iodine can be toxic in large quantities, es... More »

Walgreen's Pharmacy indicates that tincture of iodine is a topical medication used to prevent infection in minor scrapes, cuts and burns. Iodine tincture should not be used on animal bites or over large areas of the body... More »

Iodine is a pure element, whereas iodide is an anion attached to molecules made from iodine, including potassium iodide, sodium iodide and methyl iodide. Iodide has a negative charge of one. The pure element has the chem... More »

Iodine reacts with the starch present in onion cells, producing a coloration that makes the cells easily visible under a microscope. Onion cells are naturally transparent, so it is difficult to properly visualize them wi... More »

Iodine indicates the presence of starch in a solution by altering the energy level spacing in the amylose component of starch, creating an intense blue color. This energy change allows amylose to absorb visible light. More »

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Iodine is an element that exhibits non-polar, covalent bonding, notes Elmhurst College. It has seven electrons in its outer shell. When bonded to another iodine atom, the two equally share two electrons to complete the e... More »