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Merck
CN

30314

Potassium iodate

puriss. p.a., 99.7-100.4%

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About This Item

Linear Formula:
KIO3
CAS Number:
Molecular Weight:
214.00
UNSPSC Code:
12352302
PubChem Substance ID:
EC Number:
231-831-9
MDL number:
Assay:
99.7-100.4%
Form:
solid
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InChI key

JLKDVMWYMMLWTI-UHFFFAOYSA-M

InChI

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

SMILES string

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

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

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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.

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Danger

Storage Class

5.1B - Oxidizing hazardous materials

wgk

WGK 1

flash_point_f

does not flash

flash_point_c

does not flash

Hazard Classifications

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

Regulatory Information

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Eagleson M.
Concise Encyclopedia Chemistry, 889-889 (1994)
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)
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)
Ralf Biebinger et al.
The British journal of nutrition, 102(9), 1362-1369 (2009-08-06)
Adverse sensory changes prevent the addition of highly bioavailable ferrous sulfate (FeSO4) to most wheat flours. Poorly absorbable reduced Fe powders are commonly used. Encapsulation of FeSO4 can overcome these sensory changes, but the particle size of commercial compounds is

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