What is Potassium Iodide ?
Potassium iodide Powder is ionic compound which iodine ions and silver ions can form yellow precipitate silv er iodide (when exposes to light, it can decompose, it can be used to make high-speed photographic film), silver ni trate can be used to verify the presence of iodine ions.
Potassium iodide is the raw material for the manufacture of iodide and dyes.Used as photographic photosensitive emulsifier.In medicine, it is used as an expectorant, diuretic, goiter prevention and control agent, and as a preoperative drug for hyperthyroidism.It is a cosolvent for iodine and some insoluble metal iodides.For livestock feed additives.
Product name | Potassium iodide | |
Appearance | white crystalline powder | |
Purity | 99%min | |
CAS No. | 7681-11-0 | |
EINECS No. | 231-442-4 | |
MF. | KI | |
Grade Standard | Medicine Grade , industry grade , AR grade |
(1). Raw material procurement: The main raw materials for potassium iodide are potassium carbonate and iodine, which are usually purchased from suppliers. Quality inspection of raw materials is required before procurement to ensure that they meet production requirements.
(2). Preparation of solution: Mix iodine with water to form an iodine solution. Similarly, mix potassium carbonate with water to form a potassium carbonate solution. Mix the two solutions in a certain proportion to form a mixed solution containing iodine ions and potassium ions.
(3). Crystallization: Heat and stir the mixed solution to gradually cool and crystallize. During the crystallization process, iodine ions and potassium ions combine to form potassium iodide crystals.
(4). Filtration, washing, and drying: Wash potassium iodide crystals thoroughly with water to remove impurities and unreacted substances. Then dry the potassium iodide crystal to form potassium iodide powder.
(5). Packaging and storage: Place potassium iodide powder in a sealed container to maintain its dryness and stability. During storage, it is necessary to avoid the contact of potassium iodide powder with moisture or other chemical substances to avoid affecting its quality and performance.
(1). Prevention of radioactive iodine intake: Potassium iodide is a common radioactive protective drug that can be used to prevent the human body from ingesting radioactive iodine. During nuclear accidents or medical radiation therapy, ingestion of radioactive iodine may cause damage to the thyroid gland, and potassium iodide can help reduce the absorption of radioactive iodine in the thyroid gland.
(2).Thyroid disease treatment: Potassium iodide is also used for the treatment of hyperthyroidism and thyroid enlargement. It reduces thyroid activity by inhibiting iodine uptake and synthesis of thyroid hormones.
(3). Laboratory use: Potassium iodide is widely used in the laboratory to prepare solutions, culture media, and staining reagents. It can be used in cell culture, bacterial culture, and other molecular biology and biochemistry experiments.
(4). Food processing: Iodine is an essential trace element for the human body, and potassium iodide can be used as a food additive to supplement iodine in food processing. Some foods, such as salt, flour, and seasoning, may add potassium iodide to prevent iodine deficiency disease.
(5). Photography process: Potassium iodide is used as a developer in some traditional photography processes. It can combine with silver salt to form visible images.
1. Potassium iodide powder is an ionic compound, in which iodine ions can form dark yellow precipitated silver iodide with silver ions (see photo decomposition, which can be used to make high-speed photographic films), As a component of thyroxine, iodine is closely related to the basic metabolism of livestock and poultry, and participates in almost all material metabolism processes. Iodine deficiency in livestock will cause thyroid hypertrophy, decrease the basic metabolic rate, and affect growth and development. Iodine needs to be added to the feed of young livestock and livestock in iodine deficient areas. The iodine needs of high-yield dairy cows and high-yield laying hens increase, and their feed also needs to be added with iodine. The iodine in milk and eggs increases with the increase of feed iodine. It is reported that high iodine eggs can reduce the cholesterol content of human body, which is beneficial to the health of patients with hypertension. In addition, during the animal fattening period, although there is no iodine deficiency, in order to make the thyroid function of livestock and poultry strong, enhance the anti stress ability, maintain the maximum production capacity, iodide is also supplemented. Potassium iodide is added to the feed as an iodine source, which can prevent iodine deficiency, promote growth, increase egg production rate and reproduction rate, and improve feed utilization. The amount of added to the feed is usually several PPM, because it is unstable, Iron citrate and calcium stearate (generally 10%) are added as protective agents to stabilize it.
2. Radiation protection
Countries will distribute or reserve iodine tablets for residents around nuclear power plants, the main component of which is potassium iodide. When radiation from nuclear power plants leaks out due to disasters, residents around the plants will take iodine tablets, which can saturate iodine in the thyroid and reduce the absorption of radioactive iodine 131 by the thyroid. However, when exposed to ionizing iodine radiation, it is effective to take it within 4 hours, and it cannot prevent ionizing radiation and isotopes other than iodine-131. Without instructions, improper use may cause hyperthyroidism.
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Characteristics | Analytical Method | Specification |
Appearance | Visual | White crystalline powder |
Solubility | As per BP/EP | Very soluble in water |
Identification of Potassium | As per BP/EP | Positive |
Identification of Iodine | As per BP/EP | Positive |
Appearance of aqueous solution | As per BP/EP | Clear & colourless |
Assay as KI (on dry basis) | As per BP/EP | 99.0 – 100.50 % |
Alkalinity | As per BP/EP | Passes test |
Iodates | As per BP/EP | No blue colour develops |
Sulphates | As per BP/EP | NMT 150 ppm |
Thiosulphates | As per BP/EP | Passes test |
Iron as Fe | As per BP/EP | NMT 20 ppm |
Loss on Drying | As per BP/EP | NMT 1.00 % |
Heavy metals | As per BP/EP | NMT 20 ppm |
Pb | - | NMT 3 ppm |
Cd | - | NMT 1 ppm |
Hg | - | NMT 0.1 ppm |
Pesticides | - | NMT 0.1 mg/Kg |
Total plate count | - | NMT 10000 cfu/g |
Total Yeast & Mold | - | NMT 100 cfu/g |
Particle size | - | NLT 100% through 80 mesh |
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