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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.[1] It has been proposed as a promising corrosion inhibitor for carbon steel.[2]

Application

Potassium iodate (KIO3) may be employed in the following studies:
  • As primary standard reagent for the volumetric estimations.[1]
  • Quantification of hydrolyzable tannins, such as gallotannins and ellagitannins.[3]
  • Winkler method for the estimation of dissolved oxygen.[4]
  • As a co-inhibitor along with sodium tungstate for prevention of corrosion in carbon steel.[2]

pictograms

Flame over circleExclamation mark
GHS03,GHS07

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Danger

Hazard Classifications

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

Storage Class

5.1B - Oxidizing hazardous materials

wgk_germany

WGK 1

flash_point_f

does not flash

flash_point_c

does not flash

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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)
Tatsuya Kawai et al.
Academic radiology, 18(6), 682-689 (2011-03-12)
Evaluation of contrast enhancement of pulmonary lesions with ground-glass attenuation (GGA) is difficult with conventional techniques but might be possible using contrast-mapping images (CMIs) obtained by dual-energy computed tomography. To address this issue, a phantom study was conducted, and this
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