What is the chemical formula of iodine?

Iodine is a purple-black shiny flaky crystal with atomic number 53. The isotopes existing in nature are 74 neutrons of iodine 127. Elemental iodine was first discovered by French pharmacist Courtois B. in 18 1 1 year. Element iodine is a purple-black crystal, which is easy to sublimate and condense after sublimation. Toxic and corrosive. Iodine turns blue-purple when it meets starch. Mainly used in the manufacture of drugs, dyes, iodine, test paper and iodine compounds.

Iodine is one of the essential trace elements for human body. The total amount of iodine in healthy adults is 30mg (20 ~ 50mg), and the national salt iodization standard is 20-30mg/kg.

Extended data

Iodine tank:

1. Regulate water and salt metabolism. Thyroxine can promote water and salt in tissues to enter the blood and be discharged from the kidneys. When it is insufficient, it can cause water and salt retention in tissues, and interstitial fluid containing a large amount of mucin appears in tissues, resulting in mucinous edema.

2. Promote the absorption and utilization of vitamins. Thyroxine can promote the absorption and utilization of nicotinic acid, the process of transforming carotene into vitamin A, and the synthesis of riboflavin adenine dinucleotide from riboflavin.

3. Enhance the activity of enzyme. Thyroxine can activate 100 enzymes in vivo, such as cytochrome enzyme system, succinate oxidase system, alkaline phosphatase and so on. , and play a role in substance metabolism.

4. Promote growth and development. Thyroxine promotes bone development and protein synthesis, and maintains the normal structure of central nervous system.

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