Product Description
Potassium iodide (CAS No. 7681-11-0) is an inorganic iodide compound composed of potassium ions and iodide ions. It is highly soluble in water and widely recognized as an efficient iodine source for chemical, nutritional, and industrial applications.
Due to the strong reactivity of iodide ions, potassium iodide can form silver iodide precipitates when reacting with silver ions, a property that makes it valuable in analytical chemistry and photographic applications. It is also light-sensitive and may undergo decomposition under exposure to light, which contributes to its use in specialized photographic materials.
In animal nutrition, iodine plays an essential role as a component of thyroid hormones, regulating metabolism, growth, and development. Insufficient iodine intake may affect thyroid function, reduce metabolic efficiency, and impact normal development in livestock and poultry. Therefore, potassium iodide is commonly added to animal feed, especially in iodine-deficient areas and in diets for young animals.
For high-performance livestock, including dairy cattle and laying hens, adequate iodine supplementation helps support stable production and improve the iodine content of milk and eggs. Iodine-enriched animal products may provide additional nutritional benefits for consumers, increasing their market value.
With its excellent iodine availability, nutritional functionality, and broad application potential, potassium iodide remains an important ingredient in animal feed, chemical analysis, pharmaceuticals, and specialty industrial processes.
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 |
| Odor | Odorless |
| 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 |
| Dielectric constant | 5.12 |
| BCS Class | 1 |
| 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) |
Safety Information
| Hazard Codes | Xn |
| Risk Statements | 26 |
| Safety Statements | 22-36/38 |
| WGK Germany | 1 |
| RTECS | TT2975000 |
| F | 10 |
| TSCA | Yes |
| HS Code | 28276000 |
| Hazardous Substances Data | 7681-11-0(Hazardous Substances Data) |
| Toxicity | Approx LD i.v. in rats: 285 mg/kg (Hildebrandt) |
Applications of Potassium Iodide CAS No. 7681-11-0
Potassium iodide is a widely used iodine compound with important applications in food fortification, animal nutrition, and various industrial fields. As an effective iodine source, it helps provide essential iodine supplementation and supports normal physiological functions.
Food Fortification Applications
Potassium iodide is approved for use as an iodine fortification ingredient in food products. It is commonly added to iodized salt and selected nutritional foods to help improve iodine intake and support public health nutrition.
Animal Feed Supplementation
In animal nutrition, potassium iodide serves as a valuable iodine supplement for livestock and poultry. Iodine is a key component of thyroid hormones, which regulate metabolism, energy balance, growth, reproduction, and lactation.
Promotes Growth and Production Performance
Proper potassium iodide supplementation helps maintain normal thyroid function, improve metabolic efficiency, and support healthy growth and development in animals. It is especially beneficial for young livestock and high-performance animals with increased nutritional requirements.
Prevents Iodine Deficiency in Livestock
Insufficient iodine intake may lead to metabolic imbalance, thyroid enlargement, reduced growth rates, impaired nervous system development, changes in coat condition, and decreased nutrient utilization. Adding potassium iodide to feed helps prevent iodine deficiency and supports overall animal health and productivity.
With its high iodine availability and reliable nutritional performance, potassium iodide is an important additive in food fortification, animal feed formulations, and related applications requiring a stable iodine source.
