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Sodium iodate

Sodium iodate
Sodium iodate
Names
Other names
Iodic acid, sodium salt
Identifiers
7681-55-2 N
3D model (Jmol) Interactive image
ChemSpider 22760 YesY
ECHA InfoCard 100.028.793
EC Number 231-672-5
PubChem 23675764
RTECS number NN1400000
Properties
INaO3
Molar mass 197.89 g·mol−1
Appearance White orthorhombic crystals
Odor Odorless
Density 4.28 g/cm3
Melting point 425 °C (797 °F; 698 K)
(anhydrous) decomposes
19.85 °C (67.73 °F; 293.00 K)
(pentahydrate)
2.5 g/100 mL (0 °C)
8.98 g/100 mL (20 °C)
9.47 g/100 mL (25 °C)
32.59 g/100 mL (100 °C)
Solubility Soluble in acetic acid
Insoluble in alcohol
Solubility in dimethylformamide 0.5 g/kg
−53.0·10−6 cm3/mol
Structure
Orthorhombic
Thermochemistry
125.5 J/mol·K
135 J/mol·K
−490.4 kJ/mol
35.1 kJ/mol
Hazards
GHS pictograms The flame-over-circle pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)The health hazard pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word Danger
H272, H302, H317, H334
P220, P261, P280, P342+311
Oxidizing Agent O Harmful Xn
R-phrases R8, R22, R42/43
S-phrases S17, S22, S36/37, S45
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g., calcium Special hazard OX: Oxidizer. E.g., potassium perchlorateNFPA 704 four-colored diamond
Lethal dose or concentration (LD, LC):
LD50 (median dose)
 108 mg/kg (mice, intravenous)
Related compounds
Other anions
Sodium iodide
Sodium periodate
Sodium bromate
Sodium chlorate
Other cations
Potassium iodate
Silver iodate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YesYN ?)
Infobox references

Sodium iodate (NaIO3) is the sodium salt of iodic acid. Sodium iodate is an oxidizing agent, and as such it can cause fires upon contact with combustible materials or reducing agents.

It can be prepared by reacting a sodium-containing base such as sodium hydroxide with iodic acid, for example:

It can also be prepared by adding iodine to a hot, concentrated solution of sodium hydroxide or its carbonate:

Sodium iodate can be oxidized to sodium periodate in water solutions by hypochlorites or other strong oxidizing agents:

Conditions/substances to avoid are: heat, shock, friction, combustible materials, reducing materials, aluminium, organic compounds, carbon, hydrogen peroxide, sulfides.


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