Cas number 7681-11-0 MDL number: MFCD00011405
Beilstein EINECS: 231-791-2
Molecular formula KI
Molecular weight 166.00
Potassium iodide
Colorless crystal or white powder. Slightly deliquescent. The iodine will turn yellow after long time or light exposure. Soluble in water, ethanol, acetone and glycerin, insoluble in ether, protected from moisture and protected from light. The aqueous solution is neutral or slightly alkaline and can dissolve iodine. Approximate lethal dose (rat, vein) 285mg / kg.
Density: 3.12
Melting point: 680 ℃
Boiling point: 1420 ℃ GB / T1272-88
Project ltem superior grade pure analytical pure pure
(GR) (AR) (CP)
Assay,% ≥99.5% 98.5% 98.0%
pH (50g / L solution, 25 ℃) pH of water sol-
ution6.0-8.06.0-8.06.0-8.0
Clarity test: Clarity, qualified, qualified, insoluble matter in water,% ≤0.0050.01 0.02
Chloride and bromide (as Cl) Chloride and
bromide,% ≤0.01 0.02 0.05
Iodate and iodine (calculated as IO3) lodate and iodine
Sulfate (SO4) Sulfate,% ≤0.0020.0050.01
Phosphate (PO4) Phosphate,% ≤0.0010.002--
Total nitrogen (N) Total nitrogen,% ≤0.0010.0020.002
Sodium,% ≤0.05 0.1--
Magnesium (Mg),% ≤0.0010.0020.005
Calcium,% ≤0.0010.0020.005
Iron (Fe) Iron,% ≤0.0001 0.0003 0.0005
Barium (Ba) Barium,% ≤0.0010.0020.004
Heavy metals (as Pb) Heavy metals,% ≤0.0002 0.0005 0.001
Arsenic,% ≤0.000010.00002--
Reducing substances qualified qualified-
ACS Grade Project Name ACS Grade
Content (KI) Assay≥99.0%
PH value of 5% solution at 25 ℃
pH of a 5% solution at 25 ℃ 6.0-9.2
Insoluble matter ≤0.005%
Loss on drying ≤0.2%
Chloride and chlorate (calculated as Cl)
Chlorine and bromide ≤0.01%
Iodate (IO3) Iodidi≤0.0003%
Phosphate (PO4) Phosphate ≤0.001%
Sulfate (SO4) Sulfate ≤0.005%
Barium (Ba) Barium ≤0.002%
Heavy metals (calculated as Pb) Heavy metals ≤5ppm
Iron (Fe) Iron ≤0.0003%
Calcium (Ca) Calcium ≤ 0.002%
Magnesium ≤0.001%
Sodium (Na) Sodium ≤0.005% sealed and protected from light. Easy to absorb moisture
Commonly used reagents for volume analysis of iodometry. In the haploid species, prepare media such as Burreds, Modified White, MS, and RM. Fecal inspection, etc. Take pictures. Pharmaceutical.
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