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Potassium iodide

Product Name
Potassium iodide
CAS No.
7681-11-0
Chemical Name
Potassium iodide
Synonyms
KI;I2;IODIDE;5470/11/1;IODINE SOLUTION;LUGOL;Pima;IODUM;Kaliumjodid;IODINE TINCTURE
CBNumber
CB3125298
Molecular Formula
KI
Formula Weight
166
MOL File
7681-11-0.mol
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Potassium iodide Property

Melting point:
681 °C (lit.)
Boiling point:
184 °C(lit.)
Density 
1.7 g/cm3
vapor density 
9 (vs air)
vapor pressure 
0.31 mm Hg ( 25 °C)
refractive index 
1.677
Flash point:
1330°C
storage temp. 
2-8°C
solubility 
H2O: 1 M at 20 °C, clear, colorless
form 
particles (round)
pka
0.06[at 20 ℃]
color 
Yellow
Specific Gravity
3.13
Odor
odorless
PH
6.0-9.0 (25℃, 1M in H2O)
Water Solubility 
1.43 kg/L
Sensitive 
Hygroscopic
Merck 
14,7643
Exposure limits
ACGIH: TWA 0.01 ppm
Dielectric constant
5.1200000000000001
BCS Class
1
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.
InChIKey
NLKNQRATVPKPDG-UHFFFAOYSA-M
LogP
-0.958 at 25℃
CAS DataBase Reference
7681-11-0(CAS DataBase Reference)
NIST Chemistry Reference
Potassium iodide(7681-11-0)
EPA Substance Registry System
Potassium iodide (7681-11-0)
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Safety

Hazard Codes 
Xn
Risk Statements 
26
Safety Statements 
22-36/38
WGK Germany 
1
RTECS 
TT2975000
10
TSCA 
Yes
HS Code 
28276000
Hazardous Substances Data
7681-11-0(Hazardous Substances Data)
Toxicity
Approx LD i.v. in rats: 285 mg/kg (Hildebrandt)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
PX1507
Product name
Potassium iodide
Purity
granular, Meets ACS Specifications GR ACS
Packaging
125g
Price
$76.2
Updated
2024/03/01
Sigma-Aldrich
Product number
PX1507
Product name
Potassium iodide
Purity
granular, Meets ACS Specifications GR ACS
Packaging
500g
Price
$244
Updated
2024/03/01
Sigma-Aldrich
Product number
SAB2500833
Product name
Anti-PSME3 antibody produced in goat
Purity
affinity isolated antibody, buffered aqueous solution
Packaging
100μG
Price
$568
Updated
2024/03/01
Sigma-Aldrich
Product number
PX1507
Product name
Potassium iodide
Purity
granular, Meets ACS Specifications GR ACS
Packaging
2.5kg
Price
$778
Updated
2024/03/01
Sigma-Aldrich
Product number
PX1507
Product name
Potassium iodide
Purity
granular, Meets ACS Specifications GR ACS
Packaging
12kg
Price
$3410
Updated
2024/03/01
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Potassium iodide Chemical Properties,Usage,Production

Chemical Properties

Potassium iodide is a white crystals, granules, or powder; strong, bitter, saline taste. becomes yellowish when exposed to bright light due to photochemical decomposition liberating traces of free iodine. Soluble in water, alcohol, acetone, and glycerol. slightly soluble in ether and ammonia. It may be prepared bythe reaction of iodine with hot potassiumhydroxide solution followed by separation from the iodate (which isalso formed) by fractional crystallization. In solution it has the interestingproperty of dissolving iodine to formthe triiodide ion I3-, which is brown. Potassium iodide is widely used as ananalytical reagent, in photography,and also as an additive to table salt toprevent goitre and other disordersdue to iodine deficiency.

Occurrence

Potassium iodide is found in seaweed. Some important applications of this compound involve its use in pharmaceuticals and as a source of iodine in food,especially in animal and poultry feed. Potassium iodide is added to table salt to provide iodine in human food.
Another major use is in making photographic emulsions. In analytical chemistry, potassium iodide is used in iodometric titration with starch indicator to analyze dissolved oxygen, dissolved chlorine, sulfide, and other analytes in water.

Uses

Potassium Iodide is a source of iodine and a nutrient and dietary supplement. it exists as crystals or powder and has a solubility of 1 g in 0.7 ml of water at 25°c. it is included in table salt for the preven- tion of goiter.Potassium Iodide is used primarily used in the treatment of radiation poisoning due to environmental contamination by iodine-131. It is also manufacture of photographic emulsions; in animal and poultry feeds to the extent of 10-30 parts per million; in table salt as a source of iodine and in some drinking water; also In animal chemistry. In medicine,potassium iodide is used to regulate the thyroid gland.

Definition

ChEBI: Potassium iodide is a metal iodide salt with a K(+) counterion. A compound that contains pentavalent iodine, which is usually ionically bound to electropositive atoms. It is a scavenger of hydroxyl radicals. It has a role as a radical scavenger and an expectorant. It contains an iodide. It is a type of iodine that is not radioactive and can be used to help block one type of radioactive material, radioactive iodine (I-131), from being absorbed by the thyroid.

Preparation

Potassium iodide is made by absorption of iodine in potassium hydroxide:
I2 + 6KOH → 5KI + KIO3 + 3H2O
Most potassium iodate, KIO3 , is separated from the product mixture by crystallization and filtration. Remaining iodates are removed by evaporation of the solution and other processes, such as carbon reduction or thermal decompostion at 600oC to iodide:
2KIO3 → 2KI + 3O2
Another method of preparation that does not involve the formation of iodate is by treating iron turnings with iodine solution. The product, ferrosoferric iodide, Fe3I8?16H2O, is boiled with 15 wt% potassium carbonate solution:
Fe3I8.16H2O + 4K2CO3 → 8 KI + 4CO2 + Fe3O4 + 16H2O
A similar method is used to prepare potassium bromide, discussed earlier (see Potassium Bromide.)
Potassium iodide can be prepared by reacting hydriodic acid with potassium bicarbonate:
HI + KHCO3 → KI + CO2 + H2O
It is purified by melting in dry hydrogen.
Potassium iodide also may be obtained by various electrolytic processes.

Application

Potassium iodide was first used as the primary halide in Talbot’s calotype process, then in the albumen on glass process followed by the wet collodion process. It was also used as a secondary halide in silver bromide gelatin emulsions, animal feeds, catalysts, photographic chemicals, and for sanitation. Potassium iodide is produced by reaction of potassium hydroxide with iodine. The product is purified by crystallization from water. Potassium iodide is ionic compound which iodine ions and silver ions can form yellow precipitate silver iodide (when exposes to light, it can decompose, it can be used to make high-speed photographic film), silver nitrate can be used to verify the presence of iodine ions.

brand name

Iosat (Anbex); Thyro-Block (Medpointe); Thyrosafe (R R Registrations); Thyroshield (Fleming).

General Description

Potassium iodide is an odorless white solid. Sinks and mixes with water. (USCG, 1999)

Air & Water Reactions

Water soluble.

Reactivity Profile

Bromine trifluoride rapidly attacks the following salts: barium chloride, cadmium chloride, calcium chloride, cesium chloride, lithium chloride, silver chloride, rubidium chloride, potassium bromide, potassium chloride, Potassium iodide, rhodium tetrabromide, sodium bromide, sodium chloride, and sodium iodide [Mellor 2, Supp. 1:164, 165. 1956].

Health Hazard

May irritate eyes or open cuts.

Pharmacokinetics

Potassium Iodide is a metal halide composed of potassium and iodide with thyroid protecting and expectorant properties. Potassium iodide can block absorption of radioactive iodine by the thyroid gland through flooding the thyroid with non-radioactive iodine and preventing intake of radioactive molecules, thereby protecting the thyroid from cancer causing radiation. In addition, this agent acts as an expectorant by increasing secretion of respiratory fluids resulting in decreased mucus viscosity.

Clinical Use

Potassium iodide is used to treat the cutaneous lymphatic form of sporotrichosis, although newer agents are also effective in this disorder and may be better tolerated tolerated. The drug is also used for erythema nodosum and nodular vasculitis.

Safety Profile

Poison by intravenous route. Moderately toxic by ingestion and intraperitoneal routes. Human teratogenic effects by ingestion: developmental abnormalities of the endocrine system. Experimental teratogenic and reproductive effects. Mutation data reported. Explosive reaction with charcoal + ozone, trifluoroacetyl hypofluorite, fluorine perchlorate. Violent reaction or ignition on contact with dazonium salts, diisopropyl peroxydicarbonate, bromine pentafluoride, chlorine trifluoride. Incompatible with oxidants, BrF3, FClO, metaltic salts, calomel. When heated to decomposition it emits very toxic fumes of K2O and I-. See also IODIDES.

Purification Methods

Crystallise it from distilled water (0.5mL/g) by filtering the near-boiling solution and cooling. To minimise oxidation to iodine, the process can be carried out under N2 and the salt is dried under a vacuum over P2O5 at 70-100o. Before drying, the crystals can be washed with EtOH or with acetone followed by pet ether. It has also been recrystallised from water/ethanol. After 2 recrystallisations, ACS/USP grade had Li and Sb at <0.02 and <0.01 ppm respectively. [Lingane & Kolthoff Inorg Synth I 163 1939.]

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View Lastest Price from Potassium iodide manufacturers

Jinan Finer Chemical Co., Ltd
Product
Potassium iodide 7681-11-0
Price
US $0.00/Kg/Drum
Min. Order
1KG
Purity
≥99%
Supply Ability
500mt
Release date
2021-12-13
Hebei Yime New Material Technology Co., Ltd.
Product
Potassium iodide 7681-11-0
Price
US $80.00/KG
Min. Order
100KG
Purity
99%
Supply Ability
10000 kilograms/ month
Release date
2023-11-13
Hebei Yime New Material Technology Co., Ltd.
Product
Feed grde Potassium iodide 7681-11-0
Price
US $55.00/KG
Min. Order
10KG
Purity
99%
Supply Ability
10000 kilograms/ month
Release date
2023-11-13

7681-11-0, Potassium iodideRelated Search:


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