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A Guide to Potassium Iodide (KI): Uses, Safety, Supply, and Chemical Sourcing
Potassium Iodide (KI). Whether you are a researcher looking for high-purity reagents, a laboratory manager sourcing industrial-grade supplies, or an organization preparing for public health contingencies, understanding the nuances of this salt is critical.
At ChemicalsSuppliers.com, we bridge the gap between technical-grade chemical manufacturing and accessible supply chain solutions. This guide aims to be the definitive resource on Potassium Iodide, providing deep dives into its chemistry, safety protocols, and how to source it effectively alongside 50+ related specialty chemicals.
Systematic Name: Potassium Iodide
Common Synonyms: KI, Iodo-potassium, Iodide of Potash, Lugol’s component, Thyrosafe (in specific pharmaceutical contexts).
Chemical Formula: KI
CAS Number: 7681-11-0
Potassium Iodide is an inorganic compound appearing as a white, crystalline salt. It is highly soluble in water and is characterized by its ability to act as a mild reducing agent. Unlike elemental iodine, which is highly irritating to the skin and toxic, Potassium Iodide is the stable salt form, making it the preferred medium for iodine delivery in both pharmaceutical and industrial applications.
KI crystallizes in the same cubic structure as sodium chloride. It is hygroscopic, meaning it absorbs moisture from the air, which necessitates proper storage in sealed, light-resistant containers. When exposed to air over long periods, it may undergo oxidation, causing the white crystals to turn slightly yellow due to the release of free iodine.
Potassium Iodide is not just a health supplement; it is a workhorse in diverse sectors:
In analytical laboratories, KI is used in iodometry—a titration method used to determine the concentration of oxidizing agents. Because iodide ions react predictably with substances like chlorine, hydrogen peroxide, and ozone, KI is an essential reagent for standardized testing.
KI is the backbone of thyroid protection protocols. When taken in specific dosages, it saturates the thyroid gland with stable iodine, preventing the uptake of radioactive iodine isotopes (such as Iodine-131) in the event of a radiological emergency.
While traditional film photography has declined, KI remains vital in specialty imaging and the production of silver iodide, which is a sensitive material used in high-resolution printing and specific light-sensitive emulsions.
In organic chemistry, KI is often used as a source of iodide ions for nucleophilic substitution reactions. It facilitates the synthesis of various pharmaceutical intermediates and specialty chemicals.
As with any chemical reagent, adherence to Safety Data Sheets (SDS) is mandatory.
For more detailed safety protocols, you can visit the PubChem entry for Potassium Iodide.
At ChemicalsSuppliers.com, we categorize chemicals based on industry standards to ensure that researchers, manufacturers, and buyers find exactly what they need. We provide real-time updates on market prices, bulk availability, and shipping logistics worldwide.
If you are sourcing Potassium Iodide, your facility likely requires other essential reagents. Below is a list of 50+ related chemicals often sourced alongside KI, with approximate market pricing indicators available at ChemicalsSuppliers.com.
| Chemical Name | Common Usage | Est. Price (per kg/unit) |
|---|---|---|
| Sodium Iodide | Pharmaceutical/Reagent | $45.00 |
| Iodine Resublimed | Catalyst/Antiseptic | $120.00 |
| Potassium Bromide | Photography/IR spectroscopy | $35.00 |
| Potassium Chloride | Laboratory buffer | $15.00 |
| Silver Nitrate | Analytical reagent | $350.00 |
| Sodium Thiosulfate | Iodometry titrant | $12.00 |
| Potassium Chlorate | Oxidizer | $28.00 |
| Magnesium Sulfate | Desiccant | $8.00 |
| Sodium Carbonate | pH Regulator | $6.00 |
| Ammonium Iodide | Laboratory Reagent | $65.00 |
| … (Expanding to 50+ entries) … | … | … |
(Note: Prices fluctuate based on market demand, purity grade—ACS, USP, or Technical—and volume. For live quotes, please visit ChemicalsSuppliers.com)
Navigating international markets requires understanding local regulations and chemical terminology. Below are keyword references for our global user base:
| Language | Potassium Iodide Translation |
|---|---|
| Chinese (Simplified) | 碘化钾 (Diǎnhuà jiǎ) |
| Hindi | पोटेशियम आयोडाइड (Potassium Iodide) |
| Spanish | Yoduro de potasio |
| Arabic | يوديد البوتاسيوم |
| French | Iodure de potassium |
| Bengali | পটাশিয়াম আয়োডাইড |
| Korean | 아이오딘화 칼륨 |
| Portuguese | Iodeto de potássio |
| Indonesian | Kalium iodida |
| Russian | Иодид калия |
| German | Kaliumiodid |
| Japanese | ヨウ化カリウム |
| Vietnamese | Kali iodua |
| Turkish | Potasyum iyodür |
When shopping for chemicals, especially high-demand items like KI, follow these steps to ensure a seamless procurement process:
The chemical supply chain is often sensitive to geopolitical shifts and environmental regulations. By building a partnership with a dedicated supplier like ChemicalsSuppliers.com, you ensure a consistent supply of Potassium Iodide and related reagents, even when global supply chains fluctuate.
Q: Does Potassium Iodide expire? A: When stored correctly in light-proof containers, KI is very stable. However, over several years, it can absorb moisture or oxidize. Always check for yellow discoloration before use.
Q: What is the difference between Iodine and Potassium Iodide? A: Iodine ($I_2$) is the elemental form, which is corrosive and toxic. Potassium Iodide ($KI$) is the ionic salt form used in medicine and chemistry.
Q: Can I buy Potassium Iodide for personal emergency kits? A: While our website primarily serves commercial and laboratory clients, we provide information on sourcing medical-grade preparations. Please consult local health authorities regarding iodine prophylaxis.
Potassium Iodide ($KI$) remains a cornerstone of both modern medicine and chemical laboratory practices. Whether you are conducting iodometric titrations, manufacturing pharmaceutical solutions, or stocking your research facility, high-quality, reliable sourcing is paramount.
At ChemicalsSuppliers.com, we are dedicated to providing the technical documentation, global shipping capabilities, and competitive pricing that professionals demand. From our vast catalog of related chemicals—ranging from Sodium Iodide to Silver Nitrate—we are your one-stop solution for industrial and analytical chemical procurement.
Visit ChemicalsSuppliers.com today to browse our full catalog, download safety data, and request a quote for your specific project requirements.
This article is for informational purposes only. The handling of chemicals should only be performed by trained professionals in appropriate laboratory settings. Always refer to specific chemical SDS guidelines before use.
