Potassium iodate

Potassium iodate Chemical Properties
Melting point 560 °C(lit.)
density 3.93 g/mL at 25 °C(lit.)
vapor pressure 0-0Pa at 25℃
storage temp. Store at +5°C to +30°C.
solubility H2O: 0.1 M at 20 °C, clear, colorless
pka0.047[at 20 ℃]
form Powder/Solid
color White to off-white
Odorat 100.00?%. odorless
PH6 (50g/l, H2O, 20℃)
Water Solubility Soluble
Merck 14,7642
Solubility Product Constant (Ksp)pKsp: 3.43
Stability:Stable. Materials to avoid include organics, combustibles, phosphorus, sulfur, carbon, powdered metals, cyanides, hydrides, strong reducing agents, aluminium, peroxides. Explosive when mixed with combustible material.
InChIKeyJLKDVMWYMMLWTI-UHFFFAOYSA-M
LogP-1 at 25℃
CAS DataBase Reference7758-05-6(CAS DataBase Reference)
EPA Substance Registry SystemPotassium iodate (7758-05-6)
Safety Information
Hazard Codes O,Xi,Xn,T
Risk Statements 8-36/37/38-22-61-20/21/22
Safety Statements 26-37/39-17-24/25-23-53-45-36/37/39-22
RIDADR UN 1479 5.1/PG 2
WGK Germany 3
RTECS NN1350000
21
TSCA Yes
HazardClass 5.1
PackingGroup II
HS Code 28299080
Hazardous Substances Data7758-05-6(Hazardous Substances Data)
MSDS Information
ProviderLanguage
Iodic acid potassium salt English
SigmaAldrich English
ACROS English
ALFA English
Potassium iodate Usage And Synthesis
Chemical Propertieswhite crystals or powder
Physical propertiesColorless crystals or white powder; monoclinic structure; density 3.90 g/cm3; stable at ordinary temperatures; melts at 560°C with partial decompo-sition, releasing oxygen; moderately soluble in cold water; 4.74 g/100mL at 0°C; greater solubility in boiling water 32.3 g/100mL at 100°C; soluble in potassium iodide solution; insoluble in alcohol and liquid ammonia.
UsesOxidizing agent in volumetric chemical analysis; as maturing agent and dough conditioner.
UsesOxidizer used recently to form 2-styrylchromones from o-hydroxy-ω-cinnamylideneacetophenones by oxidative cyclization.1
UsesPotassium Iodate is a source of iodine made by reacting iodine with potassium hydroxide. it is a crystalline powder which is more stable than iodide. it has a solubility of 1 g in 15 ml of water. it is used as a fast-acting dough improver; it is used with potassium bromate as an oxidizing agent to modify the protein in bread flour which pro- motes loaf volume and shape. it is used in baked goods.
DefinitionA white solid formed either by adding iodine to a hot concentrated solution of potassium hydroxide or by the electrolysis of potassium iodide solution. No hydrates are known. It is a source of iodide and iodic acid. When treated with a dilute acid and a reducing agent, the iodate ions are reduced to iodine.
Production MethodsPotassium iodate is formed (1) by electrolysis of potassium iodide under proper conditions, (2) by reaction of iodine and potassium hydroxide solution, and the fractional crystallization of iodate from iodide. Used as a source of iodate and iodic acid.
Definitionpotassium iodate: A white crystallinesolid, KIO3, soluble in waterand insoluble in ethanol; monoclinic;r.d. 3.9; m.p. 560°C. It may be preparedby the reaction of iodine withhot concentrated potassium hydroxideor by careful electrolysis ofpotassium iodide solution. It is anoxidizing agent and is used as ananalytical reagent. Some potassiumiodate is used as a food additive.
PreparationPotassium iodate can be produced by fusing potassium iodide with potassium chlorate, bromate or perchlorate:
KI + KClO3→KIO3+ KCl
The melt is extracted with water and potassium iodate is isolated from solution by crystallization.

ApplicationPotassium iodate is a fairly strong oxidizing agent that may be used in the assay of a number of pharmaceutical substances, for instance : benzalkonium chloride, cetrimide, hydralazine hydrochloride, potassium iodide, phenylhydrazine hydrochloride, semicarbazide hydrochloride and the like. Under appropriate experimental parameters the iodate reacts quantitatively with both iodides and iodine. It is, however, interesting to observe here that the iodate titrations may be carried out effectively in the presence of saturated organic acids, alcohol and a host of other organic substances.
The oxidation-reduction methods with potassium iodate invariably based on the formation of iodine monochloride (ICl) in a medium of strong hydrochloric acid solution.
General DescriptionKIO3 can be used as a substitute of KI in radiation protection. A kinetic study of thermal degradation of KIO3 by γ-rays suggests that rate of decomposition increases while activation energy decreases upon irradiation.
Flammability and ExplosibilityNonflammable
Food additiveIodine can be added to salt in the form of potassium iodide (KI) or potassium iodate (KIO3). Because KIO3 has higher stability in the presence of salt impurities, humidity, and porous packaging, it is the recommended form.
Potassium iodate, which is formed as a secondary product, is reduced by activated carbon. The product is purified by crystallization from water. Alternatively, iron (II) iodide, prepared by using iron powder and iodine, can be treated with potassium carbonate to obtain potassium iodide. High-purity potassium iodide can be prepared by the reaction of a potassium bicarbonate with hydriodic acid.
Safety ProfilePoison by ingestion and intraperitoneal routes. A trace mineral added to animal feeds. Potentially explosive reaction with charcoal + ozone, metals (e.g., powdered aluminum, copper), arsenic carbon, phosphorus, sulfur, alkali metal hydrides, alkaline earth metal hydrides, antimony sulfide, arsenic sulfide, copper sulfide, tin sulfide, metal cyanides, metal thiocyanates, manganese dioxide, phosphorus. Violent reaction with organic matter. When heated to decomposition it emits very toxic fumes of I and K2O. See also IODATES.
OverdosageOverdose of potassium iodate, an iodized salt used for iodine supplementation in areas endemic for goiter, has been shown to cause profound visual loss and extensive retinal pigmentary abnormalities.78 FA reveals RPE window defects and ERG and VEP testing show marked impairment of retinal function. Visual acuity may improve slowly over several months.
Purification MethodsIt has been crystallised twice from distilled water (3mL/g) between 100o and 0o, dried for 2hours at 140o and cooled in a desiccator. Analytical reagent grade material dried in this way is suitable for use as an analytical standard.
Calcium lactate IODIC ACID Potassium iodate, 0.1N Standardized Solution iodine Losartan potassium POTASSIUM IODATE-IODIDE SOLUTION,POTASSIUM IODATE-IODIDE Iodic acid Potassium sorbate PLATINUM POTASSIUM IODATE Potassium paraperiodate iodate Potassium bromate Potassium persulfate POTASSIUM IODATE-IODINE Potassium periodate POTASSIUM BIIODATE Potassium POTASSIUM CYANIDE

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