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Potassium iodide CAS#7681-11-0

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  • Potassium iodide CAS#7681-11-0
  • Potassium iodide CAS#7681-11-0
  • Potassium iodide CAS#7681-11-0
  • Potassium iodide CAS#7681-11-0
  • Potassium iodide CAS#7681-11-0

›

Potassium iodide CAS#7681-11-0

Excellent Solubility and Iodine Complexing Ability: Highly soluble in water and various organic solvents, and capable of dissolving iodine to form triiodide (I₃⁻), making it valuable in analytical and chemical applications.


Effective Iodine Supplement Source: Widely used as a non-radioactive iodine source in iodized salt to help prevent goiter and other iodine deficiency disorders.


Protective Thyroid Support: Can block the absorption of radioactive iodine (I-131) by the thyroid, offering protective benefits in radiation exposure scenarios.


Functional Biological Activity: Acts as a hydroxyl radical scavenger and expectorant, contributing to its pharmaceutical and therapeutic relevance.

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Product Description

Product Description of Potassium iodide CAS#7681-11-0

Potassium iodide is white crystal, granule or powder with a strong bitter saline taste. It gradually turns yellow under strong light due to photochemical decomposition releasing trace free iodine. It is easily soluble in water, alcohol, acetone and glycerol, and slightly soluble in ether and ammonia.

It is prepared by reacting iodine with hot potassium hydroxide solution, then separated from iodate by fractional crystallization. Its aqueous solution can dissolve iodine to form brown triiodide ions (I3−).
Widely used as an analytical reagent and in photography, it is also added to table salt to prevent goiter and other iodine deficiency-related diseases.


Product Application of Potassium iodide CAS#7681-11-0

Potassium iodide was firstly used as the main halide in Talbot’s calotype process, and later adopted in albumen-on-glass and wet collodion techniques. It also functions as a secondary halide in silver bromide gelatin emulsions. Besides, it is applied in animal feed, catalytic preparation, photographic chemicals and sanitation fields.

Industrially, it is produced by the reaction of potassium hydroxide with iodine, followed by water recrystallization for purification.

Product Information

Parameters


Melting point681 °C (lit.)
Boiling point184 °C(lit.)
bulk density1500kg/m3
density1.7 g/cm3
vapor density9 (vs air)
vapor pressure0.31 mm Hg ( 25 °C)
refractive index1.677
Fp1330°C
storage temp.2-8°C
solubilityH2O: 1 M at 20 °C, clear, colorless
pka0.06[at 20 ℃]
formparticles (round)
colorYellow
Specific Gravity3.13
Odorodorless
PH6.0-9.0 (25℃, 1M in H2O)
Flame ColorViolet or light purple
biological sourcerabbit
Water Solubility1.43 kg/L
SensitiveHygroscopic
Merck147643
Exposure limitsACGIH: TWA 0.01 ppm
Dielectric constant5.12
BCS Class1
Stability:Stable. Protect from light and moisture. Incompatible with strong reducing agents, strong acids, steel, aluminium, alkali metals, brass, magnesium, zinc, cadmium, copper, tin, nickel and their alloys.
Cosmetics Ingredients FunctionsANTIMICROBIAL
InChIKeyNLKNQRATVPKPDG-UHFFFAOYSA-M
LogP-0.958 at 25℃
CAS DataBase Reference7681-11-0(CAS DataBase Reference)
NIST Chemistry ReferencePotassium iodide(7681-11-0)
EPA Substance Registry SystemPotassium iodide (7681-11-0)
Absorptioncut-off at 273nm in H2O at 1M


Safety Information


Hazard CodesXn
Risk Statements26
Safety Statements22-36/38
WGK Germany1
RTECSTT2975000
F10
TSCATSCA listed
HS Code28276000
Hazardous Substances Data7681-11-0(Hazardous Substances Data)
ToxicityApprox LD i.v. in rats: 285 mg/kg (Hildebrandt)


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