Iodine CAS No.7553-56-2;12190-71-5
Pharmaceutical Materials 2025-03-20
- CAS No.7553-56-2;12190-71-5
Name
Iodine
Synonyms
iodine
iodien
Iodine
Iodine crystals
Iodine solution
TIANFU-CHEM Iodine
Iodine test solution
Iodide (I21-) (8CI,9CI)
Iodine,standard solution
Iodine Crystals or Liquid
Iodine test solution(ChP)
Iodine solution standard substance
| Attribute | Details |
|---|---|
| Chemical Name | Iodine |
| Symbol | I |
| Atomic Number | 53 |
| Atomic Weight | 126.9045 u |
| Element Group | Group 17 (Halogens) |
| Period | 5 |
| Electronic Configuration | [Kr] 4d^10 5s^2 5p^5 |
| Physical State | Solid at room temperature |
| Color | Purple-black crystalline solid with metallic luster |
| Density | 4.93 g/cm³ |
| Melting Point | 113.5°C |
| Boiling Point | 184.35°C |
| Key Chemical Properties | Easily sublimates; reacts with most metals and non-metals; soluble in organic solvents like alcohol, gasoline, and carbon disulfide; forms a deep blue complex with starch |
| Applications | Used in medicine (e.g., antiseptics like povidone-iodine and tincture of iodine), photography, dyes, water purification, and as a catalyst in chemical reactions; essential trace element for human health, involved in thyroid hormone synthesis |
| Human Health Implications | Deficiency can lead to thyroid enlargement (goiter) and intellectual and physical development impairments; excessive intake may cause hyperthyroidism or thyroiditis; safe intake through iodized salt |
| Discovery | Discovered by Bernard Courtois in 1811 while treating seaweed ash with sulfuric acid; named for its violet vapor (derived from the Greek “ides,” meaning violet) |
| Safety Information | Toxic and corrosive in its pure form; harmful if swallowed or inhaled; causes skin irritation and burns; handle with appropriate personal protective equipment and avoid contact with skin and eyes |
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