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30314

Sigma-Aldrich

Potassium iodate

puriss. p.a., 99.7-100.4%

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About This Item

Linear Formula:
KIO3
CAS Number:
7758-05-6
Molecular Weight:
214.00
EC Number:
231-831-9
MDL number:
MFCD00011406
UNSPSC Code:
12352302
PubChem Substance ID:
329753459
Assay:
99.7-100.4%
form:
solid

grade

puriss. p.a.

Assay

99.7-100.4%

form

solid

impurities

≤0.002% total nitrogen (N)

loss

≤0.05% loss on drying, 130 °C

pH

5.0-8.0 (25 °C, 5%)

mp

560 °C (lit.)

density

3.93 g/mL at 25 °C (lit.)

anion traces

bromide, bromate, chloride, chlorate (as Cl-): ≤100 mg/kg
iodide (I-): ≤10 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Cu: ≤5 mg/kg
Fe: ≤10 mg/kg
Na: ≤50 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

[K+].[O-]I(=O)=O

InChI

1S/HIO3.K/c2-1(3)4;/h(H,2,3,4);/q;+1/p-1

InChI key

JLKDVMWYMMLWTI-UHFFFAOYSA-M

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General description

Potassium iodate (KIO3) is a colorless solid having monoclinic crystal system. KI solution undergoes anodic oxidation to afford KIO3. KIO3 has strong oxidizing properties. It has been proposed as a promising corrosion inhibitor for carbon steel.

Application

Potassium iodate (KIO3) may be employed in the following studies:
  • As primary standard reagent for the volumetric estimations.
  • Quantification of hydrolyzable tannins, such as gallotannins and ellagitannins.
  • Winkler method for the estimation of dissolved oxygen.
  • As a co-inhibitor along with sodium tungstate for prevention of corrosion in carbon steel.

Pictograms

Flame over circleExclamation mark
GHS03,GHS07

Signal Word

Danger

Hazard Statements

H272,H302,H319

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Ox. Sol. 2

Storage Class Code

5.1B - Oxidizing hazardous materials

WGK

WGK 1

Flash Point(F)

does not flash

Flash Point(C)

does not flash

Regulatory Information

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Co-inhibition characteristics of sodium tungstate with potassium iodate on mild steel corrosion.
Shibli SMA and Saji VS.
Corrosion Science, 47(9), 2213-2224 (2005)
Eagleson M.
Concise Encyclopedia Chemistry, 889-889 (1994)
Paul W Hartzfeld et al.
Journal of agricultural and food chemistry, 50(7), 1785-1790 (2002-03-21)
A widely used method for analyzing hydrolyzable tannins afer reaction with KIO(3) has been modified to include a methanolysis step followed by oxidation with KIO(3). In the new method, hydrolyzable tannins (gallotannins and ellagitannins) are reacted at 85 degrees C
The Chesapeake Bay Institute technique for the Winkler dissolved oxygen method.
Carpenter JH.
Limnology and Oceanography, 10(1), 141-143 (1965)
Fabian Rohner et al.
Food and nutrition bulletin, 33(4 Suppl), S330-S335 (2013-03-01)
Despite considerable progress made in the past decade through salt iodization programs, over 2 billion people worldwide still have inadequate iodine intake, with devastating consequences for brain development and intellectual capacity. To optimize these programs with regard to salt iodine
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