INTRODUCTION
Iodine is anon-metallic, dark-grey/purple-black, lustrous, solid element. It is the heaviest and the rarest of stable halogens that can be found on the crust of earth.About fifty percent of all iodine produced and manufactured worldwide is used to form Organoiodine compounds. Iodine is an important element for many health-sustaining processes and essential for human thyroid health.
Manufacture
Iodine is obtained from: a) Brine which contains iodide ions (in particular, brines that are adjacent to oil and natural gas fields) OR b) Nitrate ores.
Industrial process of further purification includes : i) the blowing out method OR ii) the ion-exchange method
| Synonym | Molecular iodine; Diiodine |
| CAS no. | 7553-56-2 |
| EINECS no. | 231-442-4 |
| Molecular formula | I2 |
| Molecular weight | 253.81 |
| Structure | I – I |
| Applications |
|---|
| Iodine and its derivatives are used in various fields as follows: |
| Medical Use |
|---|
| • Antiseptics: Iodine is used as a disinfectant and antiseptic. Iodine solutions, such as povidone-iodine, are used to clean wounds and sterilize skin before surgery. |
| • Thyroid Health: Iodine is an essential element for the synthesis of thyroid hormones. Iodine deficiency can lead to goitre and hypothyroidism. Iodized salt is a common dietary source to prevent these conditions. |
| • Radiology: Iodine-containing contrast agents are used in medical imaging to improve the visibility of internal structures in X-rays and CT scans |
| Industrial Applications |
|---|
| • Catalysts: Iodine compounds are used as catalysts in various chemical reactions, including the production of acetic acid and polymers. |
| • Dyes and Pigments: Iodine is used in the manufacturing of certain dyes and pigments. |
| Environmental Applications |
|---|
| • Water Purification: Iodine tablets are used to disinfect water, making it safe for drinking, especially in emergency situations or during outdoor activities. |
| • Air Quality: Iodine compounds can be used in scrubbers to remove contaminants from industrial emissions. |
| Scientific Research |
|---|
| • Radioactive Tracers: Iodine isotopes, such as Iodine-131, are used in scientific research and medical diagnostics to trace and study the pathways of iodine in biological systems. |
| Test | Unit | Specifications |
|---|---|---|
| Description | – | Greyish violet brittle plates or small crystals, Prilled with metallic sheen, odor irritant, it volatiles slowly at room temperature |
| Solubility | – | Very slight soluble in water, very soluble in concentrated solution of Iodides, soluble in Ethanol (96%), slightly soluble in Glycerol |
| Identification | ||
| Test –A | – | When heated gently it should give violet vapours which condense forming a bluish-black crystalline sublime |
| Test –B | – | Saturated solution yields a blue colour in the presence of starch solution which should disappear when the solution is heated and reappear when its cooled |
| Bromide & Chloride | % | Max 0.025 |
| Non-Volatile Matter | % | Max 0.05 |
| Heavy Metals | % | Max 0.001 |
| Chlorides | % | Max 0.001 |
| Assay | % | 99.80 – 100.0 |
STORAGE
Tightly closed. Dry. Keep it in well-ventilated place.
PACKING
25 kg UN approved HDPE drums
REACH Status
Not registered
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