Potassium Iodide

GTC-541

Inorganic Salts

Potassium Iodide

CAS No.
7681-11-0
Catalogue ID
GTC-541

Potassium Iodide, CAS 7681-11-0. Source-derived identification, physical data and applications are provided for catalogue reference; request the current specification, COA and SDS for the required grade.

Catalogue aliases / related identifiers

KI; Potassium monoiodide; Potassium salt of hydriodic acid; Iodic acid potassium salt; Kali iodide; Potide; SSKI; Iosat

Supplied catalogue source: GTC-541 · Page 47

Reference data — confirm before ordering or use

The information below is a structured migration from the supplied catalogue snapshot. It is not a current product specification, COA or SDS. Confirm the actual supplier, grade, batch documents, classification, packing and destination requirements for your enquiry.


Basic Information of Potassium Iodide

CAS No.:7681-11-0
EC No.:231-659-4
Linear Formula:KI
Molecular Weight:166
Appearance:White crystalline solid or powder.
Melting point: 681 °C (lit.)
Density:1.7 g/cm3
Solubility:Very soluble in water. Soluble in ethanol, methanol, and acetone.
Nature: Hygroscopic (absorbs moisture from the air), especially at high humidity. Can slowly oxidize to iodine when exposed to air and light, turning yellowish.
Chemical Structure:Molecular Structure of Potassium Iodide

Our commitment to delivering high-purity Potassium Iodide ensures a reliable and efficient component for your critical processes, offering consistent quality for diverse industrial needs.


Primary Applications of Potassium Iodide (KI)

Potassium Iodide's unique chemical and physiological properties make it an incredibly valuable and widely used compound with applications across numerous industries:

  1. Thyroid Blocking in Radiation Emergencies:

    One of its most critical applications is in radiation protection. Administered orally, Potassium Iodide saturates the thyroid gland with stable iodine, preventing the uptake of radioactive iodine isotopes released during nuclear incidents and reducing the risk of thyroid cancer.

  2. Pharmaceutical and Medical Uses:

    It is used in various pharmaceutical formulations as an expectorant (to help clear mucus), as a treatment for certain fungal infections (sporotrichosis), and in hyperthyroidism treatment. It also serves as a source of iodide for iodine supplementation.

  3. Analytical Chemistry:

    Potassium Iodide is a crucial reagent in analytical chemistry, particularly in iodometry and iodimetry. It's used as a source of iodide ions for redox titrations and in the preparation of standard solutions.

  4. Photographic Industry:

    Historically and still in some niche applications, it is used in the photographic industry in the preparation of emulsions and as a component in certain developers and toners.

  5. Veterinary Medicine:

    It is used in veterinary medicine as an expectorant and for treating certain conditions in livestock.

  6. Optical Materials and Scintillators:

    Potassium Iodide crystals, especially doped with thallium (KI(Tl)), are used as scintillation detectors in radiation detection equipment due to their ability to emit light when exposed to ionizing radiation. It's also used in some optical components due to its transparency across a wide spectrum.

  7. Disinfectant and Antiseptic Precursor:

    It can be used in the preparation of various iodine-based disinfectants and antiseptics.


  • Exceptional Purity & Consistent Quality: Our Potassium Iodide is manufactured to stringent purity specifications, crucial for pharmaceutical applications, precise analytical work, and reliable performance in critical medical uses.

  • Commitment to Quality & Safety: We adhere to the highest industry standards for quality management, safety, and environmental responsibility across all our operations, ensuring peace of mind for our clients.


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