Iodine-125

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Iodine-125

Iodine-125 (I-125 or 125I) is a radioisotope of iodine which has uses in biology, chemistry, and medicine. It is a gamma emitter with a half-life of 59.4 days.

Pronunciation

Iodine-125 is pronounced as /ˈaɪ.əˌdaɪn/ -125.

Etymology

The term "Iodine-125" is derived from the Greek word 'iodes' meaning violet, and the atomic number 125. The isotope is named as such due to its characteristic violet-colored vapor.

Uses

Iodine-125 is commonly used in medicine as a radiotracer. It is used in brachytherapy, a form of radiation therapy where the radioactive source is placed inside or next to the area requiring treatment. Iodine-125 is also used in radioimmunoassay, a technique used to measure concentrations of antigens in the body.

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