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

form 

Powder/Solid

pka

0.047[at 20 ℃]

color 

White to off-white

Odor

at 100.00?%. odorless

PH

6 (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.

InChIKey

JLKDVMWYMMLWTI-UHFFFAOYSA-M

LogP

-1 at 25℃

CAS DataBase Reference

7758-05-6(CAS DataBase Reference)

EPA Substance Registry System

Potassium 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

F 

21

TSCA 

Yes

HazardClass 

5.1

PackingGroup 

II

HS Code 

28299080

Hazardous Substances Data

7758-05-6(Hazardous Substances Data)

MSDS

• Language:English Provider:Iodic acid potassium salt
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Potassium iodate Usage And Synthesis

Description

Potassium iodate is an iodine-rich salt with the formula KIO3. In hot and humid climates, iodine vapor is hydrolyzed due to the hygroscopicity of potassium iodide. Compared to potassium iodide, potassium iodate is more stable and has a longer shelf life. It is a potent blocker of radioactive iodine uptake by the thyroid gland.

Chemical Properties

white crystals or powder

Physical properties

Colorless 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.

Uses

Oxidizer used recently to form 2-styrylchromones from o-hydroxy-ω-cinnamylideneacetophenones by oxidative cyclization.1

Uses

Oxidizing agent in volumetric chemical analysis; as maturing agent and dough conditioner.

Uses

Potassium 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.

Definition

A 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.

Definition

potassium 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.

Application

Potassium 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.

Preparation

Potassium 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.

Production Methods

Potassium 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.

General Description

KIO₃ 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 Explosibility

Non flammable

Food additive

Iodine 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 Profile

Poison 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.

Overdosage

Overdose 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 Methods

It 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.

Potassium iodate (7758-05-6)Related Product Information

• Potassium sorbate
• Potassium Acetate
• Potassium chloride
• Potassium bromate
• Potassium persulfate
• Potassium sulfate
• Losartan potassium
• Iodic acid
• Cuprous iodide
• Sodium iodide
• Hydriodic acid
• Calcium lactate
• Potassium periodate
• Potassium
• Potassium nitrate
• POTASSIUM IODATE PDV SALT,POTASSIUM IODATE PURE DRIED VACUUM SALT
• PLATINUM POTASSIUM IODATE
• Potassium hydroxide