Potassium iodide
Potassium iodide (KI), CAS 7681-11-0, is a white crystalline solid with a molecular weight of 166.00 g/mol. This inorganic salt is highly soluble in water and finds significant utility across various chemical applications. It serves as a crucial reagent in chemical synthesis, a component in photographic processes, and is used in certain analytical chemistry techniques. Its properties make it a versatile compound for laboratory and industrial settings.
Chemical Synthesis Reagent
Potassium iodide is a versatile reagent in organic and inorganic synthesis. It is commonly used as a source of iodide ions in substitution reactions and as a catalyst or co-catalyst in various transformations.
Analytical Chemistry
In analytical chemistry, potassium iodide is employed in iodometric titrations for the quantitative determination of oxidizing agents. It is also used in the preparation of certain reagents and solutions for specific analytical procedures.
Photography
Historically, potassium iodide was a key component in photographic emulsions, reacting with silver nitrate to form light-sensitive silver iodide. While digital photography has reduced this application, it remains relevant in some specialized photographic processes.
| Molecular weight | 166.00 |
|---|---|
| Linear formula | KI |
| Assay | ≥99.5% |
| Grade | SAJ first grade |
| Solubility | H2O: soluble1 M at 20 °C, clear, colorless |
| pH | 6.0-9.0 (20 °C, 5%) |
| Concentration | 15 % (w/v) |
| Melting point | 681 °C(lit.) |
| Vapour pressure | 1 mmHg (745 °C) |
| Loss on drying | ≤0.2% loss on drying, 105 °C |
| Particle size | −10 mesh |
| Impurities tested | ≤0.0005% heavy metals (as Pb)≤0.001% total nitrogen (N)≤0.005% thiosulfate (S2O3)≤0.02% free alkali (as KOH) |
Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/38 |
| Safety statements (S) | 26 |
| Cation traces | As: ≤0.1 mg/kgBa: ≤20 mg/kgCa: ≤10 mg/kgFe: ≤3 mg/kgMg: ≤10 mg/kgNa: ≤300 mg/kg |
| Anion traces | bromide, chloride (as Cl-): ≤100 mg/kgiodate (IO3-): ≤2 mg/kgphosphate (PO43-): ≤10 mg/kgsulfate (SO42-): ≤10 mg/kg |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Availability | available only in Japan |
|---|---|
| Absorption | absorption1M/273 nm, H2O cut-off |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What are the primary uses of Potassium Iodide?
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Potassium iodide (KI) is primarily used as a reagent in chemical synthesis and analytical chemistry, such as in iodometric titrations. It has also seen historical application in photography.
What is the CAS number and chemical formula for Potassium Iodide?
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The CAS number for Potassium Iodide is 7681-11-0, and its chemical formula is KI.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Potassium Iodide in SAJ first grade with an assay of ≥99.5%. We do not represent this product as meeting USP, BP, or EP pharmacopoeia standards.
How should Potassium Iodide be handled safely?
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Potassium Iodide is classified as harmful if swallowed (H302) and causes skin (H315) and serious eye irritation (H319). When handling, wear eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended if dust is generated.
Is Potassium Iodide available for export?
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Potassium Iodide is available only in Japan from this supplier, and cannot be exported.
How can I request a quote or sample for Potassium Iodide?
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To request a quote or sample for Potassium Iodide, please contact our sales department through the website or by phone, providing your specific requirements and shipping details.
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