Potassium Iodide

CAS #: 7681-11-0

Chemical Formula: KI

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CAS #EC NumberHill FormulaChemical FormulaMolar MassGrade Value
7681-11-0231-659-4IKKI166.01 g/molISO,Reag. Ph Eur
Catalogue Number105043
Product Information
CAS number7681-11-0
EC number231-659-4
GradeISO,Reag. Ph Eur
Hill FormulaIK
Chemical formulaKI
Molar Mass166.01 g/mol
HS Code2827 60 12
Physicochemical Information
Boiling point1325 °C (1013 hPa)
Density3.13 g/cm3 (20 °C)
Melting Point680 °C
pH value6.9 (50 g/l, H₂O, 20 °C)
Vapor pressure1 hPa (745 °C)
Bulk density1500 kg/m3
Solubility1430 g/l
Toxicological Information
LD 50 oralLD50 Rat 2779 mg/kg
Safety Information according to GHS
Hazard Pictogram(s)Hazard Pictogram(s)Hazard Pictogram(s)
Hazard Statement(s)H372: Causes damage to organs through prolonged or repeated exposure if swallowed.
Precautionary Statement(s)P260: Do not breathe dust.
P264: Wash skin thoroughly after handling.
P270: Do not eat, drink or smoke when using this product.
P314: Get medical advice/ attention if you feel unwell.
P501: Dispose of contents/ container to an approved waste disposal plant.
Signal WordDanger
Storage class6.1D Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
WGKWGK 3 highly hazardous to water
Inorganic salts: Container I. Neutral solutions of the these salts: Container D. Before placing in Container D, check the pH with pH-Universal indicator strips (Item No. 109535).
Storage and Shipping Information
StorageStore at +2°C to +30°C.
Assay (argentometric)≥ 99.5 %
Assay (argentometric; calculated on dried substance)99.5 – 100.5 %
Identitypasses test
Appearance of solutionpasses test
Alkaline impuritiespasses test
pH-value (5 %; water)6 – 8
Chloride and Bromide (as Cl)≤ 0.01 %
Iodate (IO₃)≤ 0.0003 %
Phosphate (PO₄)≤ 0.001 %
Sulfate (SO₄)≤ 0.001 %
Thiosulfate (S₂O₃)passes test
Total nitrogen (N)≤ 0.001 %
Heavy metals (as Pb)≤ 0.0005 %
As (Arsenic)≤ 0.00001 %
Ba (Barium)≤ 0.002 %
Ca (Calcium)≤ 0.001 %
Cu (Copper)≤ 0.0002 %
Fe (Iron)≤ 0.0002 %
Mg (Magnesium)≤ 0.001 %
Na (Sodium)≤ 0.03 %
Pb (Lead)≤ 0.0002 %
Reducing substancespasses test
Loss on Drying (105 °C)≤ 0.5 %
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