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Potassium iodide

Chemical properties Uses Feed additives Radiation effects Solubility in water Preparation Identification test Toxicity
Potassium iodide
Potassium iodide
CAS No.
7681-11-0
Chemical Name:
Potassium iodide
Synonyms
I2;KI;K1-N;Pima;LUGOL;IODUM;Jodid;Kisol;IODIDE;Potide
CBNumber:
CB3125298
Molecular Formula:
IK
Formula Weight:
166
MOL File:
7681-11-0.mol

Potassium iodide Properties

Melting point:
113 °C(lit.)
Boiling point:
184 °C(lit.)
Density 
1.32 g/mL at 25 °C
vapor density 
9 (vs air)
vapor pressure 
0.31 mm Hg ( 25 °C)
refractive index 
1.677
Flash point:
1330°C
storage temp. 
Store at RT.
solubility 
H2O: 1 M at 20 °C, clear, colorless
form 
particles (round)
color 
Yellow
PH
6.0-9.0 (25℃, 1M in H2O)
Water Solubility 
1.43 kg/L
Sensitive 
Hygroscopic
Merck 
14,7643
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.
CAS DataBase Reference
7681-11-0(CAS DataBase Reference)
NIST Chemistry Reference
Potassium iodide(7681-11-0)
EPA Substance Registry System
Potassium iodide (KI)(7681-11-0)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501
Precautionary statements:
P314 Get medical advice/attention if you feel unwell.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Potassium iodide price More Price(80)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 03124 Potassium iodide 99.0-100.5% (calc. to the dried substance) 7681-11-0 6x1kg $1200 2017-11-08 Buy
Sigma-Aldrich 03124 Potassium iodide 99.0-100.5% (calc. to the dried substance) 7681-11-0 1kg $283 2017-11-08 Buy
Alfa Aesar 10842 Potassium iodide, Puratronic?, 99.998% (metals basis) 7681-11-0 5g $53.5 2017-11-08 Buy
Alfa Aesar 10842 Potassium iodide, Puratronic?, 99.998% (metals basis) 7681-11-0 25g $155 2017-11-08 Buy
Strem Chemicals 19-3200 Potassium iodide, 99+% (ACS) 7681-11-0 100g $40 2017-11-27 Buy

Potassium iodide Chemical Properties,Uses,Production

Chemical properties

Colorless or white cubic crystals or granules; becomes yellowish when exposed to bright light due to photochemical decomposition liberating traces of free iodine; density 3.13 g/cm3; melts at 681°C; vaporizes at 1,330°C; highly soluble in water, ~140 g/100mL at 20°C; aqueous solution readily dissolves iodine; sparingly soluble in ethanol (about 2 g/100mL at 25°C) and acetone; slightly soluble in ether and ammonia.

Uses

Industry Application Role/benefit
Dietary supplement Animal feeds and human diet Iodine fortifier/source of iodine
Medicine Goiter Goiter control agent/source of iodine
Long-term lung problems Expectorant/helps you cough up the mucus so you can breathe more easily
Thyroid protection during nuclear or radiological emergencies Blocks thyroid from absorbing radioactive iodine
Chemical analysis Chromatographic analysis and spot analysis Analytical reagent/easily be reduced to iodine
Chemical manufacture Manufacture of iodine compounds and dyes Raw material
Film photography Preparation of silver iodide (AgI) Raw material/react with silver nitrate to make silver iodide (AgI)
Biomedical research Quenching of fluorescence Fluorescence quenching agent/ iodide ion induces the collisional quenching of fluorescent substances
Organic synthesis Preparation of aryl iodides Iodizating agent
Others Dye sensitised solar cells Component in the electrolyte
Dissolution of iodine and refractory metal iodide Cosolvent

Feed additives

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. Iodine is ingredient of thyroxine, it is closely related to basal metabolism livestock, it participates in almost all the metabolism process, livestock iodine deficiency can cause thyroid hypertrophy, basal metabolic rate dropps, and affects growth and development. Young animals and animal feed of iodine deficiency area need add iodine, iodine requirements of high producing dairy cows, yield hens should increase, the feed also need to add iodine. Iodine of milk and egg increases with dietary iodine. According to reports, periodate eggs can reduce cholesterol levels and good for the health of patients with hypertension. In addition, during the fattening of animals, though not iodine deficiency, in order to make livestock hypothyroidism strong, enhanced anti-stress, maintain the highest production capacity, iodide is also added, potassium iodide as the iodine source is added to feed, it can prevent iodine deficiency disorders, promote growth, increase egg production rate and reproduction rate and improve feed efficiency, the amount of feed is generally a few PPM, because of its instability, iron citrate and calcium stearate (generally 10%) is usually added as protective agent to make it stable.

Radiation effects

Various countries aim at surrounding residents of nuclear power plants to provide or reserves iodine tablets, the main ingredient is potassium iodide, when nuclear power plant occurs disaster and radiation leaks, the surrounding residents should take iodine tablets, iodine can saturate the thyroid gland and reduce absorption of radioactive iodine-131. When suffers the free iodine radiation exposure, within four hours can take effect, but it can not prevent ionizing radiation of iodine-131 exceptant and isotope. Improper use may cause hyperthyroidism symptoms without instructions for most people.

Solubility in water

Grams which dissolves in per 100 ml of water at different temperatures (℃):
128g/0 ℃; 136g/10 ℃; 144g/20 ℃; 153g/30 ℃; 162g/40 ℃; 168g/50 ℃
176g/60 ℃; 192g/80 ℃; 198g/90 ℃; 206g/100 ℃

Preparation

Potassium iodide is made by absorption of iodine in potassium hydroxide:
POTASSIUM IODIDE 7613I2 + 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.

Identification test

10% of the sample liquid potassium test (IT-27) and iodide test (IT-18), it is positive.

Toxicity

GRAS (FDA, §184.1634,2000).
Toxicity 1: See iodine.
Toxicity 2: It is generally recognized as safe (US Food and Drug Administration, 1985). The edible salt is in the amount of 0.01% or less.

Uses

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.

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.

Potassium iodide Preparation Products And Raw materials

Raw materials

Preparation Products


Potassium iodide Suppliers

Global( 396)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shanghai Time Chemicals CO., Ltd.
+86-021-57951555
+86-021-57951555 jack.li@time-chemicals.com CHINA 1372 55
Shenzhen Sendi Biotechnology Co.Ltd.
0755-23311925 18102838259
0755-23311925 Abel@chembj.com CHINA 3229 55
Shanghai Excellent Chemical Co., Ltd. 0086-21-33559231; 018964673308 qq48685515;Skype: excellentchem
0086-21-33559231 sales@excellentchem.com China 2110 59
Chengdu RunZeBenTu Chemical Co., Ltd 13096311329 028-88469284 qq:616445927
028-88469284 616445927@qq.com China 2984 50
Shanghai Macklin Biochemical Co.,Ltd. 15221275939
021-51821727 shenlinxing@macklin.cn China 13251 55
Chengdu RunZeBenTu Chemical Co., Ltd 028-88469284 18000562381
028-88469284 rzbtsj@163.com China 10011 56
Shanghai XiZhi Chemical Co., Ltd. 021-69005855
021-69005955 xizhichem@163.com China 4254 55
Wuhan Fortuna Chemical Co., Ltd +86-27-59207852 85767163
+86-27-59524646 info@fortunachem.com China 3102 58
Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 sale@aladdin-e.com China 25121 65
Aikon International Limited 025-66061683,18551800669//qq:2850281404
cfding@aikonchem.com China 10308 58

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