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| Potassium iodide is commonly known as gray iodine. Chemical formula KI. Molecular weight 166.00. Colorless or white cubic crystals. It tastes salty and bitter. There is slight deliquescence in humid air, and when exposed to air, it is easily oxidized, releasing iodine and gradually turning yellow. Light and moisture can accelerate its decomposition. The specific gravity is 3.13. Melting point 681 ℃. Boiling point 1330 ℃. Easy to dissolve in water, soluble in ethanol, methanol, acetone, glycerol, and liquid ammonia, slightly soluble in ether. Its aqueous solution is neutral or slightly alkaline, and it can dissolve iodine to generate triiodide ions (I3-). Its aqueous solution is also prone to oxidation and yellowing, especially in acidic conditions, which can be prevented by adding alkali. Obtained by the reaction of hydroiodic acid and potassium bicarbonate. Used as analytical reagents and raw materials for the production of iodides and dyes, as well as photographic emulsifiers, food additives, etc. Used in medicine to prevent and treat goiter (neck disease), as well as for preoperative preparation of hyperthyroidism. In addition, it can also be used as an expectorant, diuretic, etc | |||||||||
7681-11-0
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7681-11-0
Potassium iodide
CAS 7681-11-0
Molecular formula: KI
Molecular weight: 166
Structural formula:
1. Performance and use
Potassium iodide is commonly known as gray iodine. Chemical formula KI. Molecular weight 166.00. Colorless or white cubic crystals. It tastes salty and bitter. Slightly deliquescent in humid air, easily oxidized when exposed to air, releases iodine and gradually turns yellow. Light and moisture can accelerate its decomposition
Used as analytical reagents, chromatography analysis, and drop analysis, as well as in the preparation of photographic emulsifiers, pharmaceutical industry, soap, lithography, organic synthesis, medicine, food additives, etc
Potassium iodide is a food iodine fortifier that is allowed to be used. According to Chinese regulations, it can be used in infant and toddler food at a dosage of 0.3-0.6mg/kg. Can also be used for table salt
2. Technical indicators
| Potassium iodide Basic information | |
| Product Name: | Potassium iodide |
| CAS: | 7681-11-0 |
| MF: | KI |
| MW: | 166 |
| EINECS: | 231-659-4 |
| Mol File: | 7681-11-0.mol |
| Potassium iodide Chemical Properties | |
| Melting point | 681 °C (lit.) |
| Boiling point | 184 °C(lit.) |
| density | 1.7 g/cm3 |
| vapor density | 9 (vs air) |
| vapor pressure | 0.31 mm Hg ( 25 °C) |
| refractive index | 1.677 |
| Fp | 1330°C |
| storage temp. | 2-8°C |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | particles (round) |
| pka | 0.06[at 20 ℃] |
| color | Yellow |
| Specific Gravity | 3.13 |
| PH | 6.0-9.0 (25℃, 1M in H2O) |
| Water Solubility | 1.43 kg/L |
| Sensitive | Hygroscopic |
| Merck | 147,643 |
| Exposure limits | ACGIH: TWA 0.01 ppm |
| Stability: | Stable. Protect from light and moisture. Incompatible with strong reducing agents, strong acids, steel, aluminium, alkali metals, brass, magnesium, zinc, cadmium, copper, tin, nickel and their alloys. |
| InChIKey | NLKNQRATVPKPDG-UHFFFAOYSA-M |
| LogP | -0.958 at 25℃ |
| CAS DataBase Reference | 7681-11-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Potassium iodide(7681-11-0) |
| EPA Substance Registry System | Potassium iodide (7681-11-0) |
Product Name | Potassium iodide 7681-11-0 |
Batch No |
20230111 | ||
MFG. Date |
2022.01.11 |
Sampling Date |
2023.01.11 | ||
Quantity |
150kg |
Report Date |
2023.01.12 | ||
Test Items | Specification | Test Results | |||
Appearance | white crystal powder | white crystal powder | |||
Assay, (As dried basis) | ≥99.0% | 99.3% | |||
Chloride (As Cl-) | ≤0.5% | passed | |||
2- SO4 | ≤0.04% | passed | |||
Iodate | Passed | passed | |||
Barium | Passed | passed | |||
Fe | ≤0.002% | passed | |||
Loss on dry | ≤1.0% | 0.03% | |||
Heavy metal | passed | passed | |||
Conclusion The product conforms the CP2020 | |||||
3.Usage
Potassium iodide is a food iodine fortifier that is allowed to be used. According to Chinese regulations, it can be used for infant and toddler food, with a dosage of 0.3-0.6mg/kg
4. Packaging and storage
Package: 25kg/drum
storage : Avoid light and moisture. Incompatible with strong reducing agents, strong acids, steel, aluminum, alkali metals, brass, magnesium, zinc, cadmium, copper, tin, nickel, and their alloys.
Related keywords
potassium iodided
iodide potassium
iodide potassium powder
